diff --git a/resources/profiles/PrusaResearch.idx b/resources/profiles/PrusaResearch.idx
index 0ce99a416b..bf92297530 100644
--- a/resources/profiles/PrusaResearch.idx
+++ b/resources/profiles/PrusaResearch.idx
@@ -1,4 +1,6 @@
 min_slic3r_version = 2.4.0-alpha0
+1.4.0-alpha2 Updated Prusa MINI machine limits.
+1.4.0-alpha1 Added new SL1S resin profiles.
 1.4.0-alpha0 Bumped up config version.
 1.3.0-alpha2 Added SL1S SPEED profiles.
 1.3.0-alpha1 Added Prusament PCCF. Increased travel acceleration for Prusa MINI. Updated start g-code for Prusa MINI. Added multiple add:north and Extrudr filament profiles. Updated Z travel speed values.
diff --git a/resources/profiles/PrusaResearch.ini b/resources/profiles/PrusaResearch.ini
index 3bc4a039bb..3dd9100570 100644
--- a/resources/profiles/PrusaResearch.ini
+++ b/resources/profiles/PrusaResearch.ini
@@ -5,7 +5,7 @@
 name = Prusa Research
 # Configuration version of this file. Config file will only be installed, if the config_version differs.
 # This means, the server may force the PrusaSlicer configuration to be downgraded.
-config_version = 1.4.0-alpha0
+config_version = 1.4.0-alpha2
 # Where to get the updates from?
 config_update_url = https://files.prusa3d.com/wp-content/uploads/repository/PrusaSlicer-settings-master/live/PrusaResearch/
 changelog_url = https://files.prusa3d.com/?latest=slicer-profiles&lng=%1%
@@ -5426,13 +5426,6 @@ initial_exposure_time = 25
 material_type = Tough
 material_vendor = Made for Prusa
 
-[sla_material:Prusa Polymers Orange @0.025 SL1S]
-inherits = *0.025_sl1s*
-exposure_time = 1.8
-initial_exposure_time = 25
-material_type = Tough
-material_vendor = Prusa Polymers
-
 [sla_material:3DM-ABS Orange @0.025 SL1S]
 inherits = *0.025_sl1s*
 exposure_time = 1.8
@@ -5461,6 +5454,20 @@ initial_exposure_time = 25
 material_type = Tough
 material_vendor = Peopoly
 
+[sla_material:Peopoly Deft White @0.025 SL1S]
+inherits = *0.025_sl1s*
+exposure_time = 1.8
+initial_exposure_time = 25
+material_type = Tough
+material_vendor = Peopoly
+
+[sla_material:Peopoly Neo Clear @0.025 SL1S]
+inherits = *0.025_sl1s*
+exposure_time = 1.8
+initial_exposure_time = 25
+material_type = Tough
+material_vendor = Peopoly
+
 ## 0.05 SL1S
 
 [sla_material:Prusa Orange Tough @0.05 SL1S]
@@ -5547,13 +5554,6 @@ initial_exposure_time = 25
 material_type = Tough
 material_vendor = Made for Prusa
 
-[sla_material:Prusa Polymers Orange @0.05 SL1S]
-inherits = *0.05_sl1s*
-exposure_time = 2
-initial_exposure_time = 25
-material_type = Tough
-material_vendor = Prusa Polymers
-
 [sla_material:3DM-ABS Orange @0.05 SL1S]
 inherits = *0.05_sl1s*
 exposure_time = 2.6
@@ -5582,6 +5582,20 @@ initial_exposure_time = 25
 material_type = Tough
 material_vendor = Peopoly
 
+[sla_material:Peopoly Deft White @0.05 SL1S]
+inherits = *0.05_sl1s*
+exposure_time = 2
+initial_exposure_time = 25
+material_type = Tough
+material_vendor = Peopoly
+
+[sla_material:Peopoly Neo Clear @0.05 SL1S]
+inherits = *0.05_sl1s*
+exposure_time = 2
+initial_exposure_time = 25
+material_type = Tough
+material_vendor = Peopoly
+
 ## 0.1 SL1S
 
 [sla_material:Prusa Orange Tough @0.1 SL1S]
@@ -5668,13 +5682,6 @@ initial_exposure_time = 25
 material_type = Tough
 material_vendor = Made for Prusa
 
-[sla_material:Prusa Polymers Orange @0.1 SL1S]
-inherits = *0.1_sl1s*
-exposure_time = 2.6
-initial_exposure_time = 25
-material_type = Tough
-material_vendor = Prusa Polymers
-
 [sla_material:3DM-ABS Orange @0.1 SL1S]
 inherits = *0.1_sl1s*
 exposure_time = 3
@@ -5703,6 +5710,20 @@ initial_exposure_time = 25
 material_type = Tough
 material_vendor = Peopoly
 
+[sla_material:Peopoly Deft White @0.1 SL1S]
+inherits = *0.1_sl1s*
+exposure_time = 2.6
+initial_exposure_time = 25
+material_type = Tough
+material_vendor = Peopoly
+
+[sla_material:Peopoly Neo Clear @0.1 SL1S]
+inherits = *0.1_sl1s*
+exposure_time = 2.6
+initial_exposure_time = 25
+material_type = Tough
+material_vendor = Peopoly
+
 [printer:*common*]
 printer_technology = FFF
 bed_shape = 0x0,250x0,250x210,0x210
@@ -6330,8 +6351,8 @@ machine_max_acceleration_e = 5000
 machine_max_acceleration_extruding = 1250
 machine_max_acceleration_retracting = 1250
 machine_max_acceleration_travel = 2500
-machine_max_acceleration_x = 1250
-machine_max_acceleration_y = 1250
+machine_max_acceleration_x = 2500
+machine_max_acceleration_y = 2500
 machine_max_acceleration_z = 400
 machine_max_feedrate_e = 80
 machine_max_feedrate_x = 180
diff --git a/src/libnest2d/include/libnest2d/utils/rotcalipers.hpp b/src/libnest2d/include/libnest2d/utils/rotcalipers.hpp
index 76f91ba0cf..e703a38015 100644
--- a/src/libnest2d/include/libnest2d/utils/rotcalipers.hpp
+++ b/src/libnest2d/include/libnest2d/utils/rotcalipers.hpp
@@ -90,12 +90,29 @@ inline R rectarea(const Pt& w, const std::array<It, 4>& rect)
     return rectarea<Pt, Unit, R>(w, *rect[0], *rect[1], *rect[2], *rect[3]);
 }
 
+template<class Pt, class Unit = TCompute<Pt>, class R = TCompute<Pt>>
+inline R rectarea(const Pt& w, // the axis
+                  const Unit& a,
+                  const Unit& b)
+{
+    R m = R(a) / pl::magnsq<Pt, Unit>(w);
+    m = m * b;
+    return m;
+};
+
+template<class R, class Pt, class Unit>
+inline R rectarea(const RotatedBox<Pt, Unit> &rb)
+{
+    return rectarea<Pt, Unit, R>(rb.axis(), rb.bottom_extent(), rb.right_extent());
+};
+
 // This function is only applicable to counter-clockwise oriented convex
 // polygons where only two points can be collinear witch each other.
-template <class RawShape, 
-          class Unit = TCompute<RawShape>, 
-          class Ratio = TCompute<RawShape>> 
-RotatedBox<TPoint<RawShape>, Unit> minAreaBoundingBox(const RawShape& sh) 
+template <class RawShape,
+          class Unit = TCompute<RawShape>,
+          class Ratio = TCompute<RawShape>,
+          class VisitFn>
+void rotcalipers(const RawShape& sh, VisitFn &&visitfn)
 {
     using Point = TPoint<RawShape>;
     using Iterator = typename TContour<RawShape>::const_iterator;
@@ -104,21 +121,21 @@ RotatedBox<TPoint<RawShape>, Unit> minAreaBoundingBox(const RawShape& sh)
     // Get the first and the last vertex iterator
     auto first = sl::cbegin(sh);
     auto last = std::prev(sl::cend(sh));
-    
+
     // Check conditions and return undefined box if input is not sane.
-    if(last == first) return {};
+    if(last == first) return;
     if(getX(*first) == getX(*last) && getY(*first) == getY(*last)) --last;
-    if(last - first < 2) return {};
-    
+    if(last - first < 2) return;
+
     RawShape shcpy; // empty at this point
-    {   
+    {
         Point p = *first, q = *std::next(first), r = *last;
-        
+
         // Determine orientation from first 3 vertex (should be consistent)
         Unit d = (Unit(getY(q)) - getY(p)) * (Unit(getX(r)) - getX(p)) -
                  (Unit(getX(q)) - getX(p)) * (Unit(getY(r)) - getY(p));
-        
-        if(d > 0) { 
+
+        if(d > 0) {
             // The polygon is clockwise. A flip is needed (for now)
             sl::reserve(shcpy, last - first);
             auto it = last; while(it != first) sl::addVertex(shcpy, *it--);
@@ -126,69 +143,69 @@ RotatedBox<TPoint<RawShape>, Unit> minAreaBoundingBox(const RawShape& sh)
             first = sl::cbegin(shcpy); last = std::prev(sl::cend(shcpy));
         }
     }
-    
+
     // Cyclic iterator increment
     auto inc = [&first, &last](Iterator& it) {
-       if(it == last) it = first; else ++it;
+        if(it == last) it = first; else ++it;
     };
-    
+
     // Cyclic previous iterator
-    auto prev = [&first, &last](Iterator it) { 
-        return it == first ? last : std::prev(it); 
+    auto prev = [&first, &last](Iterator it) {
+        return it == first ? last : std::prev(it);
     };
-    
+
     // Cyclic next iterator
     auto next = [&first, &last](Iterator it) {
-        return it == last ? first : std::next(it);    
+        return it == last ? first : std::next(it);
     };
-    
-    // Establish initial (axis aligned) rectangle support verices by determining 
+
+    // Establish initial (axis aligned) rectangle support verices by determining
     // polygon extremes:
-    
+
     auto it = first;
     Iterator minX = it, maxX = it, minY = it, maxY = it;
-    
+
     do { // Linear walk through the vertices and save the extreme positions
-        
+
         Point v = *it, d = v - *minX;
         if(getX(d) < 0 || (getX(d) == 0 && getY(d) < 0)) minX = it;
-        
+
         d = v - *maxX;
         if(getX(d) > 0 || (getX(d) == 0 && getY(d) > 0)) maxX = it;
-        
+
         d = v - *minY;
         if(getY(d) < 0 || (getY(d) == 0 && getX(d) > 0)) minY = it;
-        
+
         d = v - *maxY;
         if(getY(d) > 0 || (getY(d) == 0 && getX(d) < 0)) maxY = it;
-        
+
     } while(++it != std::next(last));
-    
+
     // Update the vertices defining the bounding rectangle. The rectangle with
-    // the smallest rotation is selected and the supporting vertices are 
+    // the smallest rotation is selected and the supporting vertices are
     // returned in the 'rect' argument.
     auto update = [&next, &inc]
-            (const Point& w, std::array<Iterator, 4>& rect) 
+        (const Point& w, std::array<Iterator, 4>& rect)
     {
         Iterator B = rect[0], Bn = next(B);
         Iterator R = rect[1], Rn = next(R);
         Iterator T = rect[2], Tn = next(T);
         Iterator L = rect[3], Ln = next(L);
-        
+
         Point b = *Bn - *B, r = *Rn - *R, t = *Tn - *T, l = *Ln - *L;
         Point pw = perp(w);
         using Pt = Point;
-        
+
         Unit dotwpb = dot<Pt, Unit>( w, b), dotwpr = dot<Pt, Unit>(-pw, r);
         Unit dotwpt = dot<Pt, Unit>(-w, t), dotwpl = dot<Pt, Unit>( pw, l);
         Unit dw     = magnsq<Pt, Unit>(w);
-        
+
         std::array<Ratio, 4> angles;
         angles[0] = (Ratio(dotwpb) / magnsq<Pt, Unit>(b)) * dotwpb;
         angles[1] = (Ratio(dotwpr) / magnsq<Pt, Unit>(r)) * dotwpr;
         angles[2] = (Ratio(dotwpt) / magnsq<Pt, Unit>(t)) * dotwpt;
         angles[3] = (Ratio(dotwpl) / magnsq<Pt, Unit>(l)) * dotwpl;
-        
+
         using AngleIndex = std::pair<Ratio, size_t>;
         std::vector<AngleIndex> A; A.reserve(4);
 
@@ -196,65 +213,84 @@ RotatedBox<TPoint<RawShape>, Unit> minAreaBoundingBox(const RawShape& sh)
             if(rect[i] != rect[j] && angles[i] < dw) {
                 auto iv = std::make_pair(angles[i], i);
                 auto it = std::lower_bound(A.begin(), A.end(), iv,
-                                           [](const AngleIndex& ai, 
-                                              const AngleIndex& aj) 
-                { 
-                    return ai.first > aj.first; 
+                                           [](const AngleIndex& ai,
+                                              const AngleIndex& aj)
+                {
+                    return ai.first > aj.first;
                 });
-                
+
                 A.insert(it, iv);
             }
         }
-        
+
         // The polygon is supposed to be a rectangle.
         if(A.empty()) return false;
-       
+
         auto amin = A.front().first;
         auto imin = A.front().second;
         for(auto& a : A) if(a.first == amin) inc(rect[a.second]);
-            
+
         std::rotate(rect.begin(), rect.begin() + imin, rect.end());
-        
+
         return true;
     };
-    
+
     Point w(1, 0);
-    Point w_min = w;
-    Ratio minarea((Unit(getX(*maxX)) - getX(*minX)) * 
-                  (Unit(getY(*maxY)) - getY(*minY)));
-    
     std::array<Iterator, 4> rect = {minY, maxX, maxY, minX};
-    std::array<Iterator, 4> minrect = rect;
-    
+
+    {
+        Unit a = dot<Point, Unit>(w, *rect[1] - *rect[3]);
+        Unit b = dot<Point, Unit>(-perp(w), *rect[2] - *rect[0]);
+        if (!visitfn(RotatedBox<Point, Unit>{w, a, b}))
+            return;
+    }
+
     // An edge might be examined twice in which case the algorithm terminates.
     size_t c = 0, count = last - first + 1;
     std::vector<bool> edgemask(count, false);
-    
-    while(c++ < count) 
-    {   
+
+    while(c++ < count)
+    {
         // Update the support vertices, if cannot be updated, break the cycle.
         if(! update(w, rect)) break;
-        
+
         size_t eidx = size_t(rect[0] - first);
-        
+
         if(edgemask[eidx]) break;
         edgemask[eidx] = true;
-                
+
         // get the unnormalized direction vector
         w = *rect[0] - *prev(rect[0]);
-        
-        // get the area of the rotated rectangle
-        Ratio rarea = rectarea<Point, Unit, Ratio>(w, rect);
-        
-        // Update min area and the direction of the min bounding box;
-        if(rarea <= minarea) { w_min = w; minarea = rarea; minrect = rect; }
+
+        Unit a = dot<Point, Unit>(w, *rect[1] - *rect[3]);
+        Unit b = dot<Point, Unit>(-perp(w), *rect[2] - *rect[0]);
+        if (!visitfn(RotatedBox<Point, Unit>{w, a, b}))
+            break;
     }
-    
-    Unit a = dot<Point, Unit>(w_min, *minrect[1] - *minrect[3]);
-    Unit b = dot<Point, Unit>(-perp(w_min), *minrect[2] - *minrect[0]);
-    RotatedBox<Point, Unit> bb(w_min, a, b);
-    
-    return bb;
+}
+
+// This function is only applicable to counter-clockwise oriented convex
+// polygons where only two points can be collinear witch each other.
+template <class S,
+          class Unit = TCompute<S>,
+          class Ratio = TCompute<S>>
+RotatedBox<TPoint<S>, Unit> minAreaBoundingBox(const S& sh)
+{
+    RotatedBox<TPoint<S>, Unit> minbox;
+    Ratio minarea = std::numeric_limits<Unit>::max();
+    auto minfn = [&minarea, &minbox](const RotatedBox<TPoint<S>, Unit> &rbox){
+        Ratio area = rectarea<Ratio>(rbox);
+        if (area <= minarea)  {
+            minarea = area;
+            minbox = rbox;
+        }
+
+        return true; // continue search
+    };
+
+    rotcalipers<S, Unit, Ratio>(sh, minfn);
+
+    return minbox;
 }
 
 template <class RawShape> Radians minAreaBoundingBoxRotation(const RawShape& sh)
@@ -262,7 +298,75 @@ template <class RawShape> Radians minAreaBoundingBoxRotation(const RawShape& sh)
     return minAreaBoundingBox(sh).angleToX();
 }
 
+// Function to find a rotation for a shape that makes it fit into a box.
+//
+// The method is based on finding a pair of rotations from the rotating calipers
+// algorithm such that the aspect ratio is changing from being smaller than
+// that of the target to being bigger or vice versa. So that the correct
+// AR is somewhere between the obtained pair of angles. Then bisecting that
+// interval is sufficient to find the correct angle.
+//
+// The argument eps is the absolute error limit for the searched angle interval.
+template<class S, class Unit = TCompute<S>, class Ratio = TCompute<S>>
+Radians fitIntoBoxRotation(const S &shape, const _Box<TPoint<S>> &box, Radians eps = 1e-4)
+{
+    constexpr auto get_aspect_r = [](const auto &b) -> double {
+        return double(b.width()) / b.height();
+    };
 
+    auto aspect_r = get_aspect_r(box);
+
+    RotatedBox<TPoint<S>, Unit> prev_rbox;
+    Radians a_from = 0., a_to = 0.;
+    auto visitfn = [&](const RotatedBox<TPoint<S>, Unit> &rbox) {
+        bool lower_prev    = get_aspect_r(prev_rbox) < aspect_r;
+        bool lower_current = get_aspect_r(rbox) < aspect_r;
+
+        if (lower_prev != lower_current) {
+            a_from = prev_rbox.angleToX();
+            a_to   = rbox.angleToX();
+            return false;
+        }
+
+        return true;
+    };
+
+    rotcalipers<S, Unit, Ratio>(shape, visitfn);
+
+    auto rot_shape_bb = [&shape](Radians r) {
+        auto s = shape;
+        sl::rotate(s, r);
+        return sl::boundingBox(s);
+    };
+
+    auto rot_aspect_r = [&rot_shape_bb, &get_aspect_r](Radians r) {
+        return get_aspect_r(rot_shape_bb(r));
+    };
+
+    // Lets bisect the retrieved interval where the correct aspect ratio is.
+    double ar_from = rot_aspect_r(a_from);
+    auto would_fit = [&box](const _Box<TPoint<S>> &b) {
+        return b.width() < box.width() && b.height() < box.height();
+    };
+
+    Radians middle = (a_from + a_to) / 2.;
+    _Box<TPoint<S>> box_middle = rot_shape_bb(middle);
+    while (!would_fit(box_middle) && std::abs(a_to - a_from) > eps)
+    {
+        double ar_middle = get_aspect_r(box_middle);
+        if ((ar_from < aspect_r) != (ar_middle < aspect_r))
+            a_to = middle;
+        else
+            a_from = middle;
+
+        ar_from = rot_aspect_r(a_from);
+        middle = (a_from + a_to) / 2.;
+        box_middle = rot_shape_bb(middle);
+    }
+
+    return middle;
 }
 
+} // namespace libnest2d
+
 #endif // ROTCALIPERS_HPP
diff --git a/src/libslic3r/Arrange.cpp b/src/libslic3r/Arrange.cpp
index 9602ebdbd1..bf2a219d0d 100644
--- a/src/libslic3r/Arrange.cpp
+++ b/src/libslic3r/Arrange.cpp
@@ -379,7 +379,7 @@ public:
         });
 
         if (stopcond) m_pck.stopCondition(stopcond);
-        
+
         m_pck.configure(m_pconf);
     }
      
@@ -472,6 +472,12 @@ template<class S> Radians min_area_boundingbox_rotation(const S &sh)
         .angleToX();
 }
 
+template<class S>
+Radians fit_into_box_rotation(const S &sh, const _Box<TPoint<S>> &box)
+{
+    return fitIntoBoxRotation<S, TCompute<S>, boost::rational<LargeInt>>(sh, box);
+}
+
 template<class BinT> // Arrange for arbitrary bin type
 void _arrange(
         std::vector<Item> &           shapes,
@@ -509,10 +515,19 @@ void _arrange(
     // Use the minimum bounding box rotation as a starting point.
     // TODO: This only works for convex hull. If we ever switch to concave
     // polygon nesting, a convex hull needs to be calculated.
-    if (params.allow_rotations)
-        for (auto &itm : shapes)
+    if (params.allow_rotations) {
+        for (auto &itm : shapes) {
             itm.rotation(min_area_boundingbox_rotation(itm.rawShape()));
 
+            // If the item is too big, try to find a rotation that makes it fit
+            if constexpr (std::is_same_v<BinT, Box>) {
+                auto bb = itm.boundingBox();
+                if (bb.width() >= bin.width() || bb.height() >= bin.height())
+                    itm.rotate(fit_into_box_rotation(itm.transformedShape(), bin));
+            }
+        }
+    }
+
     arranger(inp.begin(), inp.end());
     for (Item &itm : inp) itm.inflate(-infl);
 }
diff --git a/src/libslic3r/Exception.hpp b/src/libslic3r/Exception.hpp
index fababa47d5..1b8ad50a77 100644
--- a/src/libslic3r/Exception.hpp
+++ b/src/libslic3r/Exception.hpp
@@ -15,6 +15,7 @@ class Exception : public std::runtime_error { using std::runtime_error::runtime_
 SLIC3R_DERIVE_EXCEPTION(CriticalException,  Exception);
 SLIC3R_DERIVE_EXCEPTION(RuntimeError,       CriticalException);
 SLIC3R_DERIVE_EXCEPTION(LogicError,         CriticalException);
+SLIC3R_DERIVE_EXCEPTION(HardCrash,          CriticalException);
 SLIC3R_DERIVE_EXCEPTION(InvalidArgument,    LogicError);
 SLIC3R_DERIVE_EXCEPTION(OutOfRange,         LogicError);
 SLIC3R_DERIVE_EXCEPTION(IOError,            CriticalException);
diff --git a/src/libslic3r/Execution/ExecutionTBB.hpp b/src/libslic3r/Execution/ExecutionTBB.hpp
index cf6373c466..2250b8e322 100644
--- a/src/libslic3r/Execution/ExecutionTBB.hpp
+++ b/src/libslic3r/Execution/ExecutionTBB.hpp
@@ -1,8 +1,9 @@
 #ifndef EXECUTIONTBB_HPP
 #define EXECUTIONTBB_HPP
 
+#include <mutex>
+
 #include <tbb/spin_mutex.h>
-#include <tbb/mutex.h>
 #include <tbb/parallel_for.h>
 #include <tbb/parallel_reduce.h>
 #include <tbb/task_arena.h>
@@ -34,7 +35,7 @@ private:
 
 public:
     using SpinningMutex = tbb::spin_mutex;
-    using BlockingMutex = tbb::mutex;
+    using BlockingMutex = std::mutex;
 
     template<class It, class Fn>
     static void for_each(const ExecutionTBB &,
diff --git a/src/libslic3r/MeshBoolean.cpp b/src/libslic3r/MeshBoolean.cpp
index f58ae0bfe0..599ac47845 100644
--- a/src/libslic3r/MeshBoolean.cpp
+++ b/src/libslic3r/MeshBoolean.cpp
@@ -208,16 +208,20 @@ static bool _cgal_intersection(CGALMesh &A, CGALMesh &B, CGALMesh &R)
 template<class Op> void _cgal_do(Op &&op, CGALMesh &A, CGALMesh &B)
 {
     bool success = false;
+    bool hw_fail = false;
     try {
         CGALMesh result;
         try_catch_signal({SIGSEGV, SIGFPE}, [&success, &A, &B, &result, &op] {
             success = op(A, B, result);
-        }, [&] { success = false; });
+        }, [&] { hw_fail = true; });
         A = std::move(result);      // In-place operation does not work
     } catch (...) {
         success = false;
     }
 
+    if (hw_fail)
+        throw Slic3r::HardCrash("CGAL mesh boolean operation crashed.");
+
     if (! success)
         throw Slic3r::RuntimeError("CGAL mesh boolean operation failed.");
 }
diff --git a/src/libslic3r/Print.cpp b/src/libslic3r/Print.cpp
index 4561de247d..dca11a9209 100644
--- a/src/libslic3r/Print.cpp
+++ b/src/libslic3r/Print.cpp
@@ -36,7 +36,7 @@ PrintRegion::PrintRegion(PrintRegionConfig &&config) : PrintRegion(std::move(con
 
 void Print::clear() 
 {
-	tbb::mutex::scoped_lock lock(this->state_mutex());
+	std::scoped_lock<std::mutex> lock(this->state_mutex());
     // The following call should stop background processing if it is running.
     this->invalidate_all_steps();
 	for (PrintObject *object : m_objects)
@@ -252,7 +252,7 @@ bool Print::is_step_done(PrintObjectStep step) const
 {
     if (m_objects.empty())
         return false;
-    tbb::mutex::scoped_lock lock(this->state_mutex());
+    std::scoped_lock<std::mutex> lock(this->state_mutex());
     for (const PrintObject *object : m_objects)
         if (! object->is_step_done_unguarded(step))
             return false;
diff --git a/src/libslic3r/PrintApply.cpp b/src/libslic3r/PrintApply.cpp
index 698edbf3b6..a3b96bfe14 100644
--- a/src/libslic3r/PrintApply.cpp
+++ b/src/libslic3r/PrintApply.cpp
@@ -915,7 +915,7 @@ Print::ApplyStatus Print::apply(const Model &model, DynamicPrintConfig new_full_
         update_apply_status(false);
 
     // Grab the lock for the Print / PrintObject milestones.
-	tbb::mutex::scoped_lock lock(this->state_mutex());
+	std::scoped_lock<std::mutex> lock(this->state_mutex());
 
     // The following call may stop the background processing.
     if (! print_diff.empty())
diff --git a/src/libslic3r/PrintBase.cpp b/src/libslic3r/PrintBase.cpp
index d129aaad2b..c4b6b7ccea 100644
--- a/src/libslic3r/PrintBase.cpp
+++ b/src/libslic3r/PrintBase.cpp
@@ -104,7 +104,7 @@ void PrintBase::status_update_warnings(int step, PrintStateBase::WarningLevel /*
         printf("%s warning: %s\n",  print_object ? "print_object" : "print", message.c_str());
 }
 
-tbb::mutex& PrintObjectBase::state_mutex(PrintBase *print)
+std::mutex& PrintObjectBase::state_mutex(PrintBase *print)
 { 
 	return print->state_mutex();
 }
diff --git a/src/libslic3r/PrintBase.hpp b/src/libslic3r/PrintBase.hpp
index e0aa56ba5a..8cb997c771 100644
--- a/src/libslic3r/PrintBase.hpp
+++ b/src/libslic3r/PrintBase.hpp
@@ -6,12 +6,8 @@
 #include <vector>
 #include <string>
 #include <functional>
-
-// tbb/mutex.h includes Windows, which in turn defines min/max macros. Convince Windows.h to not define these min/max macros.
-#ifndef NOMINMAX
-    #define NOMINMAX
-#endif
-#include "tbb/mutex.h"
+#include <atomic>
+#include <mutex>
 
 #include "ObjectID.hpp"
 #include "Model.hpp"
@@ -84,23 +80,23 @@ class PrintState : public PrintStateBase
 public:
     PrintState() {}
 
-    StateWithTimeStamp state_with_timestamp(StepType step, tbb::mutex &mtx) const {
-        tbb::mutex::scoped_lock lock(mtx);
+    StateWithTimeStamp state_with_timestamp(StepType step, std::mutex &mtx) const {
+        std::scoped_lock<std::mutex> lock(mtx);
         StateWithTimeStamp state = m_state[step];
         return state;
     }
 
-    StateWithWarnings state_with_warnings(StepType step, tbb::mutex &mtx) const {
-        tbb::mutex::scoped_lock lock(mtx);
+    StateWithWarnings state_with_warnings(StepType step, std::mutex &mtx) const {
+        std::scoped_lock<std::mutex> lock(mtx);
         StateWithWarnings state = m_state[step];
         return state;
     }
 
-    bool is_started(StepType step, tbb::mutex &mtx) const {
+    bool is_started(StepType step, std::mutex &mtx) const {
         return this->state_with_timestamp(step, mtx).state == STARTED;
     }
 
-    bool is_done(StepType step, tbb::mutex &mtx) const {
+    bool is_done(StepType step, std::mutex &mtx) const {
         return this->state_with_timestamp(step, mtx).state == DONE;
     }
 
@@ -121,8 +117,8 @@ public:
     // This is necessary to block until the Print::apply() updates its state, which may
     // influence the processing step being entered.
     template<typename ThrowIfCanceled>
-    bool set_started(StepType step, tbb::mutex &mtx, ThrowIfCanceled throw_if_canceled) {
-        tbb::mutex::scoped_lock lock(mtx);
+    bool set_started(StepType step, std::mutex &mtx, ThrowIfCanceled throw_if_canceled) {
+        std::scoped_lock<std::mutex> lock(mtx);
         // If canceled, throw before changing the step state.
         throw_if_canceled();
 #ifndef NDEBUG
@@ -154,8 +150,8 @@ public:
     // 		Timestamp when this stepentered the DONE state.
     // 		bool indicates whether the UI has to update the slicing warnings of this step or not.
 	template<typename ThrowIfCanceled>
-	std::pair<TimeStamp, bool> set_done(StepType step, tbb::mutex &mtx, ThrowIfCanceled throw_if_canceled) {
-        tbb::mutex::scoped_lock lock(mtx);
+	std::pair<TimeStamp, bool> set_done(StepType step, std::mutex &mtx, ThrowIfCanceled throw_if_canceled) {
+        std::scoped_lock<std::mutex> lock(mtx);
         // If canceled, throw before changing the step state.
         throw_if_canceled();
         assert(m_state[step].state == STARTED);
@@ -266,9 +262,9 @@ public:
     // Return value:
     // 		Current milestone (StepType).
     // 		bool indicates whether the UI has to be updated or not.
-    std::pair<StepType, bool> active_step_add_warning(PrintStateBase::WarningLevel warning_level, const std::string &message, int message_id, tbb::mutex &mtx)
+    std::pair<StepType, bool> active_step_add_warning(PrintStateBase::WarningLevel warning_level, const std::string &message, int message_id, std::mutex &mtx)
     {
-        tbb::mutex::scoped_lock lock(mtx);
+        std::scoped_lock<std::mutex> lock(mtx);
         assert(m_step_active != -1);
         StateWithWarnings &state = m_state[m_step_active];
         assert(state.state == STARTED);
@@ -314,7 +310,7 @@ protected:
     PrintObjectBase(ModelObject *model_object) : m_model_object(model_object) {}
     virtual ~PrintObjectBase() {}
     // Declared here to allow access from PrintBase through friendship.
-	static tbb::mutex&                  state_mutex(PrintBase *print);
+	static std::mutex&                  state_mutex(PrintBase *print);
 	static std::function<void()>        cancel_callback(PrintBase *print);
 	// Notify UI about a new warning of a milestone "step" on this PrintObjectBase.
 	// The UI will be notified by calling a status callback registered on print.
@@ -475,7 +471,7 @@ protected:
 	friend class PrintObjectBase;
     friend class BackgroundSlicingProcess;
 
-    tbb::mutex&            state_mutex() const { return m_state_mutex; }
+    std::mutex&            state_mutex() const { return m_state_mutex; }
     std::function<void()>  cancel_callback() { return m_cancel_callback; }
 	void				   call_cancel_callback() { m_cancel_callback(); }
 	// Notify UI about a new warning of a milestone "step" on this PrintBase.
@@ -502,7 +498,7 @@ protected:
     status_callback_type                    m_status_callback;
 
 private:
-    tbb::atomic<CancelStatus>               m_cancel_status;
+    std::atomic<CancelStatus>               m_cancel_status;
 
     // Callback to be evoked to stop the background processing before a state is updated.
     cancel_callback_type                    m_cancel_callback = [](){};
@@ -510,7 +506,7 @@ private:
     // Mutex used for synchronization of the worker thread with the UI thread:
     // The mutex will be used to guard the worker thread against entering a stage
     // while the data influencing the stage is modified.
-    mutable tbb::mutex                      m_state_mutex;
+    mutable std::mutex                      m_state_mutex;
 
     friend PrintTryCancel;
 };
diff --git a/src/libslic3r/PrintObject.cpp b/src/libslic3r/PrintObject.cpp
index eb46537ec7..ec3f4f92a2 100644
--- a/src/libslic3r/PrintObject.cpp
+++ b/src/libslic3r/PrintObject.cpp
@@ -22,7 +22,6 @@
 #include <boost/log/trivial.hpp>
 
 #include <tbb/parallel_for.h>
-#include <tbb/atomic.h>
 
 #include <Shiny/Shiny.h>
 
diff --git a/src/libslic3r/SLA/SupportTree.cpp b/src/libslic3r/SLA/SupportTree.cpp
index d9f8958a21..a0f88ed608 100644
--- a/src/libslic3r/SLA/SupportTree.cpp
+++ b/src/libslic3r/SLA/SupportTree.cpp
@@ -17,9 +17,6 @@
 #include <libnest2d/optimizers/nlopt/genetic.hpp>
 #include <libnest2d/optimizers/nlopt/subplex.hpp>
 #include <boost/log/trivial.hpp>
-#include <tbb/parallel_for.h>
-#include <tbb/mutex.h>
-#include <tbb/spin_mutex.h>
 #include <libslic3r/I18N.hpp>
 
 //! macro used to mark string used at localization,
diff --git a/src/libslic3r/SLAPrint.cpp b/src/libslic3r/SLAPrint.cpp
index 27423793ee..0b9dde1228 100644
--- a/src/libslic3r/SLAPrint.cpp
+++ b/src/libslic3r/SLAPrint.cpp
@@ -19,8 +19,6 @@
 #include <libnest2d/tools/benchmark.h>
 #endif
 
-//#include <tbb/spin_mutex.h>//#include "tbb/mutex.h"
-
 #include "I18N.hpp"
 
 //! macro used to mark string used at localization,
@@ -118,7 +116,7 @@ bool validate_pad(const indexed_triangle_set &pad, const sla::PadConfig &pcfg)
 
 void SLAPrint::clear()
 {
-    tbb::mutex::scoped_lock lock(this->state_mutex());
+    std::scoped_lock<std::mutex> lock(this->state_mutex());
     // The following call should stop background processing if it is running.
     this->invalidate_all_steps();
     for (SLAPrintObject *object : m_objects)
@@ -212,7 +210,7 @@ SLAPrint::ApplyStatus SLAPrint::apply(const Model &model, DynamicPrintConfig con
         update_apply_status(false);
 
     // Grab the lock for the Print / PrintObject milestones.
-    tbb::mutex::scoped_lock lock(this->state_mutex());
+    std::scoped_lock<std::mutex> lock(this->state_mutex());
 
     // The following call may stop the background processing.
     bool invalidate_all_model_objects = false;
@@ -514,7 +512,7 @@ SLAPrint::ApplyStatus SLAPrint::apply(const Model &model, DynamicPrintConfig con
 void SLAPrint::set_task(const TaskParams &params)
 {
     // Grab the lock for the Print / PrintObject milestones.
-    tbb::mutex::scoped_lock lock(this->state_mutex());
+    std::scoped_lock<std::mutex> lock(this->state_mutex());
 
     int n_object_steps = int(params.to_object_step) + 1;
     if (n_object_steps == 0)
@@ -884,7 +882,7 @@ bool SLAPrint::is_step_done(SLAPrintObjectStep step) const
 {
     if (m_objects.empty())
         return false;
-    tbb::mutex::scoped_lock lock(this->state_mutex());
+    std::scoped_lock<std::mutex> lock(this->state_mutex());
     for (const SLAPrintObject *object : m_objects)
         if (! object->is_step_done_unguarded(step))
             return false;
diff --git a/src/libslic3r/SLAPrintSteps.cpp b/src/libslic3r/SLAPrintSteps.cpp
index b267116e98..4a8d0d4bef 100644
--- a/src/libslic3r/SLAPrintSteps.cpp
+++ b/src/libslic3r/SLAPrintSteps.cpp
@@ -453,8 +453,7 @@ void SLAPrint::Steps::drill_holes(SLAPrintObject &po)
 
             sla::remove_inside_triangles(mesh_view, interior, exclude_mask);
         }
-
-    } catch (const std::runtime_error &) {
+    } catch (const Slic3r::RuntimeError &) {
         throw Slic3r::SlicingError(L(
             "Drilling holes into the mesh failed. "
             "This is usually caused by broken model. Try to fix it first."));
diff --git a/src/libslic3r/SupportMaterial.cpp b/src/libslic3r/SupportMaterial.cpp
index 5eb9c9433a..8fb8756eb7 100644
--- a/src/libslic3r/SupportMaterial.cpp
+++ b/src/libslic3r/SupportMaterial.cpp
@@ -14,7 +14,6 @@
 #include <boost/container/static_vector.hpp>
 
 #include <tbb/parallel_for.h>
-#include <tbb/atomic.h>
 #include <tbb/spin_mutex.h>
 #include <tbb/task_group.h>
 
diff --git a/src/libslic3r/Thread.cpp b/src/libslic3r/Thread.cpp
index d203acb90e..51dec618e4 100644
--- a/src/libslic3r/Thread.cpp
+++ b/src/libslic3r/Thread.cpp
@@ -9,10 +9,10 @@
 #include <atomic>
 #include <condition_variable>
 #include <mutex>
+#include <thread>
+#include <tbb/global_control.h>
 #include <tbb/parallel_for.h>
-#include <tbb/tbb_thread.h>
 #include <tbb/task_arena.h>
-#include <tbb/task_scheduler_init.h>
 
 #include "Thread.hpp"
 
@@ -206,13 +206,13 @@ void name_tbb_thread_pool_threads()
 	nthreads = 1;
 #endif
 
-	if (nthreads != nthreads_hw) 
-		new tbb::task_scheduler_init(int(nthreads));
+	if (nthreads != nthreads_hw)
+		tbb::global_control(tbb::global_control::max_allowed_parallelism, nthreads);
 
 	std::atomic<size_t>		nthreads_running(0);
 	std::condition_variable cv;
 	std::mutex				cv_m;
-	auto					master_thread_id = tbb::this_tbb_thread::get_id();
+	auto					master_thread_id = std::this_thread::get_id();
     tbb::parallel_for(
         tbb::blocked_range<size_t>(0, nthreads, 1),
         [&nthreads_running, nthreads, &master_thread_id, &cv, &cv_m](const tbb::blocked_range<size_t> &range) {
@@ -226,7 +226,7 @@ void name_tbb_thread_pool_threads()
 				std::unique_lock<std::mutex> lk(cv_m);
 			    cv.wait(lk, [&nthreads_running, nthreads]{return nthreads_running == nthreads;});
         	}
-        	auto thread_id = tbb::this_tbb_thread::get_id();
+        	auto thread_id = std::this_thread::get_id();
 			if (thread_id == master_thread_id) {
 				// The calling thread runs the 0'th task.
 				assert(range.begin() == 0);
diff --git a/src/libslic3r/pchheader.hpp b/src/libslic3r/pchheader.hpp
index b55755b892..ad22b855a7 100644
--- a/src/libslic3r/pchheader.hpp
+++ b/src/libslic3r/pchheader.hpp
@@ -100,12 +100,9 @@
 #include <boost/thread.hpp>
 #include <boost/version.hpp>
 
-#include <tbb/atomic.h>
 #include <tbb/parallel_for.h>
 #include <tbb/spin_mutex.h>
-#include <tbb/mutex.h>
 #include <tbb/task_group.h>
-#include <tbb/task_scheduler_init.h>
 
 #include <Eigen/Dense>
 #include <Eigen/Geometry>
diff --git a/src/libslic3r/utils.cpp b/src/libslic3r/utils.cpp
index c6e409edc9..763be8af74 100644
--- a/src/libslic3r/utils.cpp
+++ b/src/libslic3r/utils.cpp
@@ -43,7 +43,7 @@
 #include <boost/nowide/convert.hpp>
 #include <boost/nowide/cstdio.hpp>
 
-#include <tbb/task_scheduler_init.h>
+#include <tbb/global_control.h>
 
 #if defined(__linux__) || defined(__GNUC__ )
 #include <strings.h>
@@ -118,9 +118,7 @@ void trace(unsigned int level, const char *message)
 void disable_multi_threading()
 {
     // Disable parallelization so the Shiny profiler works
-    static tbb::task_scheduler_init *tbb_init = nullptr;
-    if (tbb_init == nullptr)
-        tbb_init = new tbb::task_scheduler_init(1);
+    tbb::global_control(tbb::global_control::max_allowed_parallelism, 1);
 }
 
 static std::string g_var_dir;
diff --git a/src/slic3r/GUI/BackgroundSlicingProcess.cpp b/src/slic3r/GUI/BackgroundSlicingProcess.cpp
index 8b3b375131..5503eefbfa 100644
--- a/src/slic3r/GUI/BackgroundSlicingProcess.cpp
+++ b/src/slic3r/GUI/BackgroundSlicingProcess.cpp
@@ -2,6 +2,7 @@
 #include "GUI_App.hpp"
 #include "GUI.hpp"
 #include "MainFrame.hpp"
+#include "format.hpp"
 
 #include <wx/app.h>
 #include <wx/panel.h>
@@ -74,11 +75,15 @@ std::pair<std::string, bool> SlicingProcessCompletedEvent::format_error_message(
 	bool        monospace = false;
 	try {
 		this->rethrow_exception();
-    } catch (const std::bad_alloc& ex) {
+    } catch (const std::bad_alloc &ex) {
         wxString errmsg = GUI::from_u8((boost::format(_utf8(L("%s has encountered an error. It was likely caused by running out of memory. "
                               "If you are sure you have enough RAM on your system, this may also be a bug and we would "
                               "be glad if you reported it."))) % SLIC3R_APP_NAME).str());
         error = std::string(errmsg.ToUTF8()) + "\n\n" + std::string(ex.what());
+    } catch (const HardCrash &ex) {
+        error = GUI::format("PrusaSlicer has encountered a fatal error: \"%1%\"", ex.what()) + "\n\n" +
+        		_u8L("Please save your project and restart PrusaSlicer. "
+                     "We would be glad if you reported the issue.");
     } catch (PlaceholderParserError &ex) {
 		error = ex.what();
 		monospace = true;
@@ -277,19 +282,11 @@ void BackgroundSlicingProcess::thread_proc()
 		m_state = STATE_RUNNING;
 		lck.unlock();
 		std::exception_ptr exception;
-		try {
-			assert(m_print != nullptr);
-			switch(m_print->technology()) {
-				case ptFFF: this->process_fff(); break;
-                case ptSLA: this->process_sla(); break;
-				default: m_print->process(); break;
-			}
-		} catch (CanceledException & /* ex */) {
-			// Canceled, this is all right.
-			assert(m_print->canceled());
-		} catch (...) {
-			exception = std::current_exception();
-		}
+#ifdef _WIN32
+		this->call_process_seh_throw(exception);
+#else
+		this->call_process(exception);
+#endif
 		m_print->finalize();
 		lck.lock();
 		m_state = m_print->canceled() ? STATE_CANCELED : STATE_FINISHED;
@@ -312,7 +309,118 @@ void BackgroundSlicingProcess::thread_proc()
 	// End of the background processing thread. The UI thread should join m_thread now.
 }
 
-void BackgroundSlicingProcess::thread_proc_safe()
+#ifdef _WIN32
+// Only these SEH exceptions will be catched and turned into Slic3r::HardCrash C++ exceptions.
+static bool is_win32_seh_harware_exception(unsigned long ex) throw() {
+	return
+		ex == STATUS_ACCESS_VIOLATION ||
+		ex == STATUS_DATATYPE_MISALIGNMENT ||
+		ex == STATUS_FLOAT_DIVIDE_BY_ZERO ||
+		ex == STATUS_FLOAT_OVERFLOW ||
+		ex == STATUS_FLOAT_UNDERFLOW ||
+#ifdef STATUS_FLOATING_RESEVERED_OPERAND
+		ex == STATUS_FLOATING_RESEVERED_OPERAND ||
+#endif // STATUS_FLOATING_RESEVERED_OPERAND
+		ex == STATUS_ILLEGAL_INSTRUCTION ||
+		ex == STATUS_PRIVILEGED_INSTRUCTION ||
+		ex == STATUS_INTEGER_DIVIDE_BY_ZERO ||
+		ex == STATUS_INTEGER_OVERFLOW ||
+		ex == STATUS_STACK_OVERFLOW;
+}
+
+// Rethrow some SEH exceptions as Slic3r::HardCrash C++ exceptions.
+static void rethrow_seh_exception(unsigned long win32_seh_catched)
+{
+	if (win32_seh_catched) {
+		// Rethrow SEH exception as Slicer::HardCrash.
+		if (win32_seh_catched == STATUS_ACCESS_VIOLATION || win32_seh_catched == STATUS_DATATYPE_MISALIGNMENT)
+			throw Slic3r::HardCrash(_u8L("Access violation"));
+		if (win32_seh_catched == STATUS_ILLEGAL_INSTRUCTION || win32_seh_catched == STATUS_PRIVILEGED_INSTRUCTION)
+			throw Slic3r::HardCrash(_u8L("Illegal instruction"));
+		if (win32_seh_catched == STATUS_FLOAT_DIVIDE_BY_ZERO || win32_seh_catched == STATUS_INTEGER_DIVIDE_BY_ZERO)
+			throw Slic3r::HardCrash(_u8L("Divide by zero"));
+		if (win32_seh_catched == STATUS_FLOAT_OVERFLOW || win32_seh_catched == STATUS_INTEGER_OVERFLOW)
+			throw Slic3r::HardCrash(_u8L("Overflow"));
+		if (win32_seh_catched == STATUS_FLOAT_UNDERFLOW)
+			throw Slic3r::HardCrash(_u8L("Underflow"));
+#ifdef STATUS_FLOATING_RESEVERED_OPERAND
+		if (win32_seh_catched == STATUS_FLOATING_RESEVERED_OPERAND)
+			throw Slic3r::HardCrash(_u8L("Floating reserved operand"));
+#endif // STATUS_FLOATING_RESEVERED_OPERAND
+		if (win32_seh_catched == STATUS_STACK_OVERFLOW)
+			throw Slic3r::HardCrash(_u8L("Stack overflow"));
+	}
+}
+
+// Wrapper for Win32 structured exceptions. Win32 structured exception blocks and C++ exception blocks cannot be mixed in the same function.
+unsigned long BackgroundSlicingProcess::call_process_seh(std::exception_ptr &ex) throw()
+{
+	unsigned long win32_seh_catched = 0;
+	__try {
+		this->call_process(ex);
+	} __except (is_win32_seh_harware_exception(GetExceptionCode())) {
+		win32_seh_catched = GetExceptionCode();
+	}
+	return win32_seh_catched;
+}
+void BackgroundSlicingProcess::call_process_seh_throw(std::exception_ptr &ex) throw()
+{
+	unsigned long win32_seh_catched = this->call_process_seh(ex);
+	if (win32_seh_catched) {
+		// Rethrow SEH exception as Slicer::HardCrash.
+		try {
+			rethrow_seh_exception(win32_seh_catched);
+		} catch (...) {
+			ex = std::current_exception();
+		}
+	}
+}
+#endif // _WIN32
+
+void BackgroundSlicingProcess::call_process(std::exception_ptr &ex) throw()
+{
+	try {
+		assert(m_print != nullptr);
+		switch (m_print->technology()) {
+		case ptFFF: this->process_fff(); break;
+		case ptSLA: this->process_sla(); break;
+		default: m_print->process(); break;
+		}
+	} catch (CanceledException& /* ex */) {
+		// Canceled, this is all right.
+		assert(m_print->canceled());
+		ex = std::current_exception();
+	} catch (...) {
+		ex = std::current_exception();
+	}
+}
+
+#ifdef _WIN32
+unsigned long BackgroundSlicingProcess::thread_proc_safe_seh() throw()
+{
+	unsigned long win32_seh_catched = 0;
+	__try {
+		this->thread_proc_safe();
+	} __except (is_win32_seh_harware_exception(GetExceptionCode())) {
+		win32_seh_catched = GetExceptionCode();
+	}
+	return win32_seh_catched;
+}
+void BackgroundSlicingProcess::thread_proc_safe_seh_throw() throw()
+{
+	unsigned long win32_seh_catched = this->thread_proc_safe_seh();
+	if (win32_seh_catched) {
+		// Rethrow SEH exception as Slicer::HardCrash.
+		try {
+			rethrow_seh_exception(win32_seh_catched);
+		} catch (...) {
+			wxTheApp->OnUnhandledException();
+		}
+	}
+}
+#endif // _WIN32
+
+void BackgroundSlicingProcess::thread_proc_safe() throw()
 {
 	try {
 		this->thread_proc();
@@ -349,7 +457,13 @@ bool BackgroundSlicingProcess::start()
 	if (m_state == STATE_INITIAL) {
 		// The worker thread is not running yet. Start it.
 		assert(! m_thread.joinable());
-		m_thread = create_thread([this]{this->thread_proc_safe();});
+		m_thread = create_thread([this]{
+#ifdef _WIN32
+			this->thread_proc_safe_seh_throw();
+#else // _WIN32
+			this->thread_proc_safe();
+#endif // _WIN32
+		});
 		// Wait until the worker thread is ready to execute the background processing task.
 		m_condition.wait(lck, [this](){ return m_state == STATE_IDLE; });
 	}
@@ -531,7 +645,7 @@ void BackgroundSlicingProcess::schedule_export(const std::string &path, bool exp
 		return;
 
 	// Guard against entering the export step before changing the export path.
-	tbb::mutex::scoped_lock lock(m_print->state_mutex());
+	std::scoped_lock<std::mutex> lock(m_print->state_mutex());
 	this->invalidate_step(bspsGCodeFinalize);
 	m_export_path = path;
 	m_export_path_on_removable_media = export_path_on_removable_media;
@@ -544,7 +658,7 @@ void BackgroundSlicingProcess::schedule_upload(Slic3r::PrintHostJob upload_job)
 		return;
 
 	// Guard against entering the export step before changing the export path.
-	tbb::mutex::scoped_lock lock(m_print->state_mutex());
+	std::scoped_lock<std::mutex> lock(m_print->state_mutex());
 	this->invalidate_step(bspsGCodeFinalize);
 	m_export_path.clear();
 	m_upload_job = std::move(upload_job);
@@ -557,7 +671,7 @@ void BackgroundSlicingProcess::reset_export()
 		m_export_path.clear();
 		m_export_path_on_removable_media = false;
 		// invalidate_step expects the mutex to be locked.
-		tbb::mutex::scoped_lock lock(m_print->state_mutex());
+		std::scoped_lock<std::mutex> lock(m_print->state_mutex());
 		this->invalidate_step(bspsGCodeFinalize);
 	}
 }
diff --git a/src/slic3r/GUI/BackgroundSlicingProcess.hpp b/src/slic3r/GUI/BackgroundSlicingProcess.hpp
index 12bf6fe021..6f5cd88521 100644
--- a/src/slic3r/GUI/BackgroundSlicingProcess.hpp
+++ b/src/slic3r/GUI/BackgroundSlicingProcess.hpp
@@ -174,7 +174,16 @@ public:
     
 private:
 	void 	thread_proc();
-	void 	thread_proc_safe();
+	// Calls thread_proc(), catches all C++ exceptions and shows them using wxApp::OnUnhandledException().
+	void 	thread_proc_safe() throw();
+#ifdef _WIN32
+	// Wrapper for Win32 structured exceptions. Win32 structured exception blocks and C++ exception blocks cannot be mixed in the same function.
+	// Catch a SEH exception and return its ID or zero if no SEH exception has been catched.
+	unsigned long 	thread_proc_safe_seh() throw();
+	// Calls thread_proc_safe_seh(), rethrows a Slic3r::HardCrash exception based on SEH exception
+	// returned by thread_proc_safe_seh() and lets wxApp::OnUnhandledException() display it.
+	void 			thread_proc_safe_seh_throw() throw();
+#endif // _WIN32
 	void 	join_background_thread();
 	// To be called by Print::apply() through the Print::m_cancel_callback to stop the background
 	// processing before changing any data of running or finalized milestones.
@@ -187,6 +196,20 @@ private:
     // Temporary: for mimicking the fff file export behavior with the raster output
     void	process_sla();
 
+    // Call Print::process() and catch all exceptions into ex, thus no exception could be thrown
+    // by this method. This exception behavior is required to combine C++ exceptions with Win32 SEH exceptions
+    // on the same thread.
+	void    call_process(std::exception_ptr &ex) throw();
+
+#ifdef _WIN32
+	// Wrapper for Win32 structured exceptions. Win32 structured exception blocks and C++ exception blocks cannot be mixed in the same function.
+	// Catch a SEH exception and return its ID or zero if no SEH exception has been catched.
+	unsigned long call_process_seh(std::exception_ptr &ex) throw();
+	// Calls call_process_seh(), rethrows a Slic3r::HardCrash exception based on SEH exception
+	// returned by call_process_seh().
+	void    	  call_process_seh_throw(std::exception_ptr &ex) throw();
+#endif // _WIN32
+
 	// Currently active print. It is one of m_fff_print and m_sla_print.
 	PrintBase				   *m_print 			 = nullptr;
 	// Non-owned pointers to Print instances.
diff --git a/src/slic3r/GUI/InstanceCheck.hpp b/src/slic3r/GUI/InstanceCheck.hpp
index 907b831929..10ccf7b925 100644
--- a/src/slic3r/GUI/InstanceCheck.hpp
+++ b/src/slic3r/GUI/InstanceCheck.hpp
@@ -13,7 +13,7 @@
 
 #if __linux__
 #include <boost/thread.hpp>
-#include <tbb/mutex.h>
+#include <mutex>
 #include <condition_variable>
 #endif // __linux__
 
diff --git a/src/slic3r/GUI/MainFrame.cpp b/src/slic3r/GUI/MainFrame.cpp
index 3b902879c2..9c7533acd1 100644
--- a/src/slic3r/GUI/MainFrame.cpp
+++ b/src/slic3r/GUI/MainFrame.cpp
@@ -658,7 +658,7 @@ void MainFrame::init_tabpanel()
 #endif
 #if ENABLE_VALIDATE_CUSTOM_GCODE
         if (int old_selection = e.GetOldSelection();
-            old_selection != wxNOT_FOUND && old_selection < m_tabpanel->GetPageCount()) {
+            old_selection != wxNOT_FOUND && old_selection < static_cast<int>(m_tabpanel->GetPageCount())) {
             Tab* old_tab = dynamic_cast<Tab*>(m_tabpanel->GetPage(old_selection));
             if (old_tab)
                 old_tab->validate_custom_gcodes();
diff --git a/src/slic3r/GUI/Mouse3DController.cpp b/src/slic3r/GUI/Mouse3DController.cpp
index 57b82fc782..b89bb454b4 100644
--- a/src/slic3r/GUI/Mouse3DController.cpp
+++ b/src/slic3r/GUI/Mouse3DController.cpp
@@ -66,7 +66,7 @@ void update_maximum(std::atomic<T>& maximum_value, T const& value) noexcept
 
 void Mouse3DController::State::append_translation(const Vec3d& translation, size_t input_queue_max_size)
 {
-	tbb::mutex::scoped_lock lock(m_input_queue_mutex);
+    std::scoped_lock<std::mutex> lock(m_input_queue_mutex);
     while (m_input_queue.size() >= input_queue_max_size)
         m_input_queue.pop_front();
     m_input_queue.emplace_back(QueueItem::translation(translation));
@@ -77,7 +77,7 @@ void Mouse3DController::State::append_translation(const Vec3d& translation, size
 
 void Mouse3DController::State::append_rotation(const Vec3f& rotation, size_t input_queue_max_size)
 {
-	tbb::mutex::scoped_lock lock(m_input_queue_mutex);
+    std::scoped_lock<std::mutex> lock(m_input_queue_mutex);
     while (m_input_queue.size() >= input_queue_max_size)
         m_input_queue.pop_front();
     m_input_queue.emplace_back(QueueItem::rotation(rotation.cast<double>()));
@@ -92,7 +92,7 @@ void Mouse3DController::State::append_rotation(const Vec3f& rotation, size_t inp
 
 void Mouse3DController::State::append_button(unsigned int id, size_t /* input_queue_max_size */)
 {
-	tbb::mutex::scoped_lock lock(m_input_queue_mutex);
+    std::scoped_lock<std::mutex> lock(m_input_queue_mutex);
     m_input_queue.emplace_back(QueueItem::buttons(id));
 #if ENABLE_3DCONNEXION_DEVICES_DEBUG_OUTPUT
     update_maximum(input_queue_max_size_achieved, m_input_queue.size());
@@ -274,7 +274,7 @@ void Mouse3DController::device_attached(const std::string &device)
 			m_stop_condition.notify_all();
             m_device_str = format_device_string(vid, pid);
             if (auto it_params = m_params_by_device.find(m_device_str); it_params != m_params_by_device.end()) {
-                tbb::mutex::scoped_lock lock(m_params_ui_mutex);
+                std::scoped_lock<std::mutex> lock(m_params_ui_mutex);
                 m_params = m_params_ui = it_params->second;
             }
             else
@@ -290,7 +290,7 @@ void Mouse3DController::device_detached(const std::string& device)
     int pid = 0;
     if (sscanf(device.c_str(), "\\\\?\\HID#VID_%x&PID_%x&", &vid, &pid) == 2) {
         if (std::find(_3DCONNEXION_VENDORS.begin(), _3DCONNEXION_VENDORS.end(), vid) != _3DCONNEXION_VENDORS.end()) {
-            tbb::mutex::scoped_lock lock(m_params_ui_mutex);
+            std::scoped_lock<std::mutex> lock(m_params_ui_mutex);
             m_params_by_device[format_device_string(vid, pid)] = m_params_ui;
         }
     }
@@ -301,12 +301,12 @@ void Mouse3DController::device_detached(const std::string& device)
 // Filter out mouse scroll events produced by the 3DConnexion driver.
 bool Mouse3DController::State::process_mouse_wheel()
 {
-	tbb::mutex::scoped_lock lock(m_input_queue_mutex);
-	if (m_mouse_wheel_counter == 0)
-    	// No 3DConnexion rotation has been captured since the last mouse scroll event.
+    std::scoped_lock<std::mutex> lock(m_input_queue_mutex);
+    if (m_mouse_wheel_counter == 0)
+        // No 3DConnexion rotation has been captured since the last mouse scroll event.
         return false;
     if (std::find_if(m_input_queue.begin(), m_input_queue.end(), [](const QueueItem &item){ return item.is_rotation(); }) != m_input_queue.end()) {
-    	// There is a rotation stored in the queue. Suppress one mouse scroll event.
+        // There is a rotation stored in the queue. Suppress one mouse scroll event.
         -- m_mouse_wheel_counter;
         return true;
     }
@@ -323,7 +323,7 @@ bool Mouse3DController::State::apply(const Mouse3DController::Params &params, Ca
     std::deque<QueueItem> input_queue;
     {
     	// Atomically move m_input_queue to input_queue.
-    	tbb::mutex::scoped_lock lock(m_input_queue_mutex);
+    	std::scoped_lock<std::mutex> lock(m_input_queue_mutex);
     	input_queue = std::move(m_input_queue);
         m_input_queue.clear();
     }
@@ -411,7 +411,7 @@ bool Mouse3DController::apply(Camera& camera)
 
 #ifdef _WIN32
     {
-        tbb::mutex::scoped_lock lock(m_params_ui_mutex);
+        std::scoped_lock<std::mutex> lock(m_params_ui_mutex);
         if (m_params_ui_changed) {
             m_params = m_params_ui;
             m_params_ui_changed = false;
@@ -439,7 +439,7 @@ void Mouse3DController::render_settings_dialog(GLCanvas3D& canvas) const
     Params params_copy;
     bool   params_changed = false;
     {
-    	tbb::mutex::scoped_lock lock(m_params_ui_mutex);
+    	std::scoped_lock<std::mutex> lock(m_params_ui_mutex);
     	params_copy = m_params_ui;
     }
 
@@ -557,7 +557,7 @@ void Mouse3DController::render_settings_dialog(GLCanvas3D& canvas) const
 
     if (params_changed) {
         // Synchronize front end parameters to back end.
-    	tbb::mutex::scoped_lock lock(m_params_ui_mutex);
+    	std::scoped_lock<std::mutex> lock(m_params_ui_mutex);
         auto pthis = const_cast<Mouse3DController*>(this);
 #if ENABLE_3DCONNEXION_DEVICES_DEBUG_OUTPUT
         if (params_copy.input_queue_max_size != params_copy.input_queue_max_size)
@@ -578,7 +578,7 @@ void Mouse3DController::connected(std::string device_name)
 	m_device_str = device_name;
     // Copy the parameters for m_device_str into the current parameters.
     if (auto it_params = m_params_by_device.find(m_device_str); it_params != m_params_by_device.end()) {
-    	tbb::mutex::scoped_lock lock(m_params_ui_mutex);
+    	std::scoped_lock<std::mutex> lock(m_params_ui_mutex);
     	m_params = m_params_ui = it_params->second;
     }
     m_connected = true;
@@ -589,7 +589,7 @@ void Mouse3DController::disconnected()
     // Copy the current parameters for m_device_str into the parameter database.
     assert(m_connected == ! m_device_str.empty());
     if (m_connected) {
-        tbb::mutex::scoped_lock lock(m_params_ui_mutex);
+        std::scoped_lock<std::mutex> lock(m_params_ui_mutex);
         m_params_by_device[m_device_str] = m_params_ui;
 	    m_device_str.clear();
 	    m_connected = false;
@@ -613,7 +613,7 @@ bool Mouse3DController::handle_input(const DataPacketAxis& packet)
     {
     	// Synchronize parameters between the UI thread and the background thread.
     	//FIXME is this necessary on OSX? Are these notifications triggered from the main thread or from a worker thread?
-    	tbb::mutex::scoped_lock lock(m_params_ui_mutex);
+    	std::scoped_lock<std::mutex> lock(m_params_ui_mutex);
     	if (m_params_ui_changed) {
     		m_params = m_params_ui;
     		m_params_ui_changed = false;
@@ -721,7 +721,7 @@ void Mouse3DController::run()
 
     for (;;) {
         {
-        	tbb::mutex::scoped_lock lock(m_params_ui_mutex);
+        	std::scoped_lock<std::mutex> lock(m_params_ui_mutex);
         	if (m_stop)
         		break;
         	if (m_params_ui_changed) {
@@ -986,7 +986,7 @@ bool Mouse3DController::connect_device()
 #endif // ENABLE_3DCONNEXION_DEVICES_DEBUG_OUTPUT
         // Copy the parameters for m_device_str into the current parameters.
         if (auto it_params = m_params_by_device.find(m_device_str); it_params != m_params_by_device.end()) {
-	    	tbb::mutex::scoped_lock lock(m_params_ui_mutex);
+	    	std::scoped_lock<std::mutex> lock(m_params_ui_mutex);
 	    	m_params = m_params_ui = it_params->second;
 	    }
     }
@@ -1011,7 +1011,7 @@ void Mouse3DController::disconnect_device()
 	    BOOST_LOG_TRIVIAL(info) << "Disconnected device: " << m_device_str;
         // Copy the current parameters for m_device_str into the parameter database.
         {
-	        tbb::mutex::scoped_lock lock(m_params_ui_mutex);
+	        std::scoped_lock<std::mutex> lock(m_params_ui_mutex);
 	        m_params_by_device[m_device_str] = m_params_ui;
 	    }
 	    m_device_str.clear();
diff --git a/src/slic3r/GUI/Mouse3DController.hpp b/src/slic3r/GUI/Mouse3DController.hpp
index 3376ef8140..12e9b7dc9e 100644
--- a/src/slic3r/GUI/Mouse3DController.hpp
+++ b/src/slic3r/GUI/Mouse3DController.hpp
@@ -10,12 +10,12 @@
 
 #include <queue>
 #include <atomic>
+#include <mutex>
 #include <thread>
 #include <vector>
 #include <chrono>
 #include <condition_variable>
 
-#include <tbb/mutex.h>
 
 namespace Slic3r {
 
@@ -85,7 +85,7 @@ class Mouse3DController
     	// m_input_queue is accessed by the background thread and by the UI thread. Access to m_input_queue
     	// is guarded with m_input_queue_mutex.
         std::deque<QueueItem> m_input_queue;
-        mutable tbb::mutex	  m_input_queue_mutex;
+        mutable std::mutex	  m_input_queue_mutex;
 
 #ifdef WIN32
         // When the 3Dconnexion driver is running the system gets, by default, mouse wheel events when rotations around the X axis are detected.
@@ -112,12 +112,12 @@ class Mouse3DController
 
 #if ENABLE_3DCONNEXION_DEVICES_DEBUG_OUTPUT
         Vec3d               get_first_vector_of_type(unsigned int type) const {
-            tbb::mutex::scoped_lock lock(m_input_queue_mutex);
+            std::scoped_lock<std::mutex> lock(m_input_queue_mutex);
             auto it = std::find_if(m_input_queue.begin(), m_input_queue.end(), [type](const QueueItem& item) { return item.type_or_buttons == type; });
             return (it == m_input_queue.end()) ? Vec3d::Zero() : it->vector;
         }
         size_t              input_queue_size_current() const { 
-        	tbb::mutex::scoped_lock lock(m_input_queue_mutex); 
+        	std::scoped_lock<std::mutex> lock(m_input_queue_mutex); 
         	return m_input_queue.size(); 
         }
         std::atomic<size_t> input_queue_max_size_achieved;
@@ -133,7 +133,7 @@ class Mouse3DController
     // UI thread will read / write this copy.
     Params 				m_params_ui;
     bool 	            m_params_ui_changed { false };
-    mutable tbb::mutex	m_params_ui_mutex;
+    mutable std::mutex	m_params_ui_mutex;
 
     // This is a database of parametes of all 3DConnexion devices ever connected.
     // This database is loaded from AppConfig on application start and it is stored to AppConfig on application exit.
diff --git a/src/slic3r/GUI/RemovableDriveManager.cpp b/src/slic3r/GUI/RemovableDriveManager.cpp
index 83f7077b4d..593d8241d4 100644
--- a/src/slic3r/GUI/RemovableDriveManager.cpp
+++ b/src/slic3r/GUI/RemovableDriveManager.cpp
@@ -84,7 +84,7 @@ void RemovableDriveManager::eject_drive()
 	this->update();
 #endif // REMOVABLE_DRIVE_MANAGER_OS_CALLBACKS
 	BOOST_LOG_TRIVIAL(info) << "Ejecting started"; 
-	tbb::mutex::scoped_lock lock(m_drives_mutex);
+	std::scoped_lock<std::mutex> lock(m_drives_mutex);
 	auto it_drive_data = this->find_last_save_path_drive_data();
 	if (it_drive_data != m_current_drives.end()) {
 		// get handle to device
@@ -130,7 +130,7 @@ std::string RemovableDriveManager::get_removable_drive_path(const std::string &p
 	this->update();
 #endif // REMOVABLE_DRIVE_MANAGER_OS_CALLBACKS
 
-	tbb::mutex::scoped_lock lock(m_drives_mutex);
+	std::scoped_lock<std::mutex> lock(m_drives_mutex);
 	if (m_current_drives.empty())
 		return std::string();
 	std::size_t found = path.find_last_of("\\");
@@ -146,7 +146,7 @@ std::string RemovableDriveManager::get_removable_drive_path(const std::string &p
 
 std::string RemovableDriveManager::get_removable_drive_from_path(const std::string& path)
 {
-	tbb::mutex::scoped_lock lock(m_drives_mutex);
+	std::scoped_lock<std::mutex> lock(m_drives_mutex);
 	std::size_t found = path.find_last_of("\\");
 	std::string new_path = path.substr(0, found);
 	int letter = PathGetDriveNumberW(boost::nowide::widen(new_path).c_str());	
@@ -287,7 +287,7 @@ void RemovableDriveManager::eject_drive()
 
 	DriveData drive_data;
 	{
-		tbb::mutex::scoped_lock lock(m_drives_mutex);
+		std::scoped_lock<std::mutex> lock(m_drives_mutex);
 		auto it_drive_data = this->find_last_save_path_drive_data();
 		if (it_drive_data == m_current_drives.end())
 			return;
@@ -343,7 +343,7 @@ void RemovableDriveManager::eject_drive()
 		if (success) {
 			// Remove the drive_data from m_current drives, searching by value, not by pointer, as m_current_drives may get modified during
 			// asynchronous execution on m_eject_thread.
-			tbb::mutex::scoped_lock lock(m_drives_mutex);
+			std::scoped_lock<std::mutex> lock(m_drives_mutex);
 			auto it = std::find(m_current_drives.begin(), m_current_drives.end(), drive_data);
 			if (it != m_current_drives.end())
 				m_current_drives.erase(it);
@@ -363,7 +363,7 @@ std::string RemovableDriveManager::get_removable_drive_path(const std::string &p
 	std::size_t found = path.find_last_of("/");
 	std::string new_path = found == path.size() - 1 ? path.substr(0, found) : path;
 
-	tbb::mutex::scoped_lock lock(m_drives_mutex);
+	std::scoped_lock<std::mutex> lock(m_drives_mutex);
 	for (const DriveData &data : m_current_drives)
 		if (search_for_drives_internal::compare_filesystem_id(new_path, data.path))
 			return path;
@@ -379,7 +379,7 @@ std::string RemovableDriveManager::get_removable_drive_from_path(const std::stri
     new_path = new_path.substr(0, found);
     
 	// check if same filesystem
-	tbb::mutex::scoped_lock lock(m_drives_mutex);
+	std::scoped_lock<std::mutex> lock(m_drives_mutex);
 	for (const DriveData &drive_data : m_current_drives)
 		if (search_for_drives_internal::compare_filesystem_id(new_path, drive_data.path))
 			return drive_data.path;
@@ -454,7 +454,7 @@ RemovableDriveManager::RemovableDrivesStatus RemovableDriveManager::status()
 
 	RemovableDriveManager::RemovableDrivesStatus out;
 	{
-		tbb::mutex::scoped_lock lock(m_drives_mutex);
+		std::scoped_lock<std::mutex> lock(m_drives_mutex);
 		out.has_eject = 
 			// Cannot control eject on Chromium.
 			platform_flavor() != PlatformFlavor::LinuxOnChromium &&
@@ -470,17 +470,17 @@ RemovableDriveManager::RemovableDrivesStatus RemovableDriveManager::status()
 // Update is called from thread_proc() and from most of the public methods on demand.
 void RemovableDriveManager::update()
 {
-	tbb::mutex::scoped_lock inside_update_lock;
+	std::unique_lock<std::mutex> inside_update_lock(m_inside_update_mutex, std::defer_lock);
 #ifdef _WIN32
 	// All wake up calls up to now are now consumed when the drive enumeration starts.
 	m_wakeup = false;
 #endif // _WIN32
-	if (inside_update_lock.try_acquire(m_inside_update_mutex)) {
+	if (inside_update_lock.try_lock()) {
 		// Got the lock without waiting. That means, the update was not running.
 		// Run the update.
 		std::vector<DriveData> current_drives = this->search_for_removable_drives();
 		// Post update events.
-		tbb::mutex::scoped_lock lock(m_drives_mutex);
+		std::scoped_lock<std::mutex> lock(m_drives_mutex);
 		std::sort(current_drives.begin(), current_drives.end());
 		if (current_drives != m_current_drives) {
 			assert(m_callback_evt_handler);
@@ -491,7 +491,7 @@ void RemovableDriveManager::update()
 	} else {
 		// Acquiring the m_iniside_update lock failed, therefore another update is running.
 		// Just block until the other instance of update() finishes.
-		inside_update_lock.acquire(m_inside_update_mutex);
+		inside_update_lock.lock();
 	}
 }
 
diff --git a/src/slic3r/GUI/RemovableDriveManager.hpp b/src/slic3r/GUI/RemovableDriveManager.hpp
index f707b40c32..29363647c8 100644
--- a/src/slic3r/GUI/RemovableDriveManager.hpp
+++ b/src/slic3r/GUI/RemovableDriveManager.hpp
@@ -5,7 +5,7 @@
 #include <string>
 
 #include <boost/thread.hpp>
-#include <tbb/mutex.h>
+#include <mutex>
 #include <condition_variable>
 
 // Custom wxWidget events
@@ -111,9 +111,9 @@ private:
 	// m_current_drives is guarded by m_drives_mutex
 	// sorted ascending by path
 	std::vector<DriveData> 	m_current_drives;
-	mutable tbb::mutex 		m_drives_mutex;
+	mutable std::mutex 		m_drives_mutex;
 	// Locking the update() function to avoid that the function is executed multiple times.
-	mutable tbb::mutex 		m_inside_update_mutex;
+	mutable std::mutex 		m_inside_update_mutex;
 
 	// Returns drive path (same as path in DriveData) if exists otherwise empty string.
 	std::string 			get_removable_drive_from_path(const std::string& path);