diff --git a/lib/Slic3r/GUI.pm b/lib/Slic3r/GUI.pm
index 6e52797275..5d6d8e4a65 100644
--- a/lib/Slic3r/GUI.pm
+++ b/lib/Slic3r/GUI.pm
@@ -128,7 +128,8 @@ sub OnInit {
         # On OSX the UI was not initialized correctly if the wizard was called
         # before the UI was up and running.
         $self->CallAfter(sub {
-            $self->{mainframe}->config_wizard;
+            # Run the config wizard, don't offer the "reset user profile" checkbox.
+            $self->{mainframe}->config_wizard(1);
         });
     }
     
diff --git a/lib/Slic3r/GUI/ConfigWizard.pm b/lib/Slic3r/GUI/ConfigWizard.pm
index be6fb2575e..a32d345ed0 100644
--- a/lib/Slic3r/GUI/ConfigWizard.pm
+++ b/lib/Slic3r/GUI/ConfigWizard.pm
@@ -14,13 +14,13 @@ our $wizard = 'Wizard';
 $wizard = 'Assistant' if &Wx::wxMAC || &Wx::wxGTK;
 
 sub new {
-    my ($class, $parent, $presets) = @_;
+    my ($class, $parent, $presets, $fresh_start) = @_;
     my $self = $class->SUPER::new($parent, -1, "Configuration $wizard");
 
     # initialize an empty repository
     $self->{config} = Slic3r::Config->new;
 
-    my $welcome_page = Slic3r::GUI::ConfigWizard::Page::Welcome->new($self);
+    my $welcome_page = Slic3r::GUI::ConfigWizard::Page::Welcome->new($self, $fresh_start);
     $self->add_page($welcome_page);
     $self->add_page(Slic3r::GUI::ConfigWizard::Page::Firmware->new($self));
     $self->add_page(Slic3r::GUI::ConfigWizard::Page::Bed->new($self));
@@ -50,9 +50,13 @@ sub add_page {
 
 sub run {
     my ($self) = @_;
-    my $result = undef;
+    my $result;
     if (Wx::Wizard::RunWizard($self, $self->{pages}[0])) {
         my $preset_name = $self->{pages}[0]->{preset_name};
+        $result = { 
+            preset_name         => $preset_name,
+            reset_user_profile  => $self->{pages}[0]->{reset_user_profile}
+        };
         if ($preset_name eq 'Other') {
             # it would be cleaner to have these defined inside each page class,
             # in some event getting called before leaving the page
@@ -67,9 +71,7 @@ sub run {
             # set first_layer_bed_temperature to temperature + 5
             $self->{config}->set('first_layer_bed_temperature',
                 [ ($self->{config}->bed_temperature->[0] > 0) ? ($self->{config}->bed_temperature->[0] + 5) : 0 ]);
-            $result = $self->{config};
-        } else {
-            $result = $preset_name;
+            $result->{config} = $self->{config};
         }
     }
     $self->Destroy;
@@ -266,13 +268,13 @@ sub config {
 package Slic3r::GUI::ConfigWizard::Page::Welcome;
 use base 'Slic3r::GUI::ConfigWizard::Page';
 use Wx qw(:misc :sizer wxID_FORWARD);
-use Wx::Event qw(EVT_ACTIVATE EVT_CHOICE);
+use Wx::Event qw(EVT_ACTIVATE EVT_CHOICE EVT_CHECKBOX);
 
 sub new {
-    my $class = shift;
-    my ($parent) = @_;
+    my ($class, $parent, $fresh_start) = @_;
     my $self = $class->SUPER::new($parent, "Welcome to the Slic3r Configuration $wizard", 'Welcome');
     $self->{full_wizard_workflow} = 1;
+    $self->{reset_user_profile} = 0;
 
     # Test for the existence of the old config path.
     my $message_has_legacy;
@@ -300,6 +302,10 @@ sub new {
 
     $self->{choice} = my $choice = Wx::Choice->new($self, -1, wxDefaultPosition, wxDefaultSize, []);
     $self->{vsizer}->Add($choice, 0, wxEXPAND | wxTOP | wxBOTTOM, 10);
+    if (! $fresh_start) {
+        $self->{reset_checkbox} = Wx::CheckBox->new($self, -1, "Reset user profile, install from scratch");
+        $self->{vsizer}->Add($self->{reset_checkbox}, 0, wxEXPAND | wxTOP | wxBOTTOM, 10);
+    }
 
     EVT_CHOICE($parent, $choice, sub {
         my $sel = $self->{choice}->GetStringSelection;
@@ -307,6 +313,12 @@ sub new {
         $self->set_full_wizard_workflow(($sel eq 'Other') || ($sel eq ''));
     });
 
+    if (! $fresh_start) {
+        EVT_CHECKBOX($self, $self->{reset_checkbox}, sub {
+            $self->{reset_user_profile} = $self->{reset_checkbox}->GetValue();
+        });
+    }
+
     EVT_ACTIVATE($parent, sub {
         $self->set_full_wizard_workflow($self->{preset_name} eq 'Other');
     });
diff --git a/lib/Slic3r/GUI/MainFrame.pm b/lib/Slic3r/GUI/MainFrame.pm
index eae598a09a..952b24aa2d 100644
--- a/lib/Slic3r/GUI/MainFrame.pm
+++ b/lib/Slic3r/GUI/MainFrame.pm
@@ -299,7 +299,8 @@ sub _init_menubar {
     my $helpMenu = Wx::Menu->new;
     {
         $self->_append_menu_item($helpMenu, "&Configuration $Slic3r::GUI::ConfigWizard::wizard…", "Run Configuration $Slic3r::GUI::ConfigWizard::wizard", sub {
-            $self->config_wizard;
+            # Run the config wizard, offer the "reset user profile" checkbox.
+            $self->config_wizard(0);
         });
         $helpMenu->AppendSeparator();
         $self->_append_menu_item($helpMenu, "Prusa 3D Drivers", 'Open the Prusa3D drivers download page in your browser', sub {
@@ -580,7 +581,7 @@ sub export_configbundle {
 # to auto-install a config bundle on a fresh user account,
 # but that behavior was not documented and likely buggy.
 sub load_configbundle {
-    my ($self, $file) = @_;
+    my ($self, $file, $reset_user_profile) = @_;
     return unless $self->check_unsaved_changes;
     if (!$file) {
         my $dlg = Wx::FileDialog->new($self, 'Select configuration to load:', 
@@ -595,7 +596,7 @@ sub load_configbundle {
     wxTheApp->{app_config}->update_config_dir(dirname($file));
 
     my $presets_imported = 0;
-    eval { $presets_imported = wxTheApp->{preset_bundle}->load_configbundle($file); };
+    eval { $presets_imported = wxTheApp->{preset_bundle}->load_configbundle($file, $reset_user_profile ? 1 : 0); };
     Slic3r::GUI::catch_error($self) and return;
 
     # Load the currently selected preset into the GUI, update the preset selection box.
@@ -616,7 +617,7 @@ sub load_config {
 }
 
 sub config_wizard {
-    my ($self) = @_;
+    my ($self, $fresh_start) = @_;
     # Exit wizard if there are unsaved changes and the user cancels the action.
     return unless $self->check_unsaved_changes;
     # Enumerate the profiles bundled with the Slic3r installation under resources/profiles.
@@ -632,22 +633,25 @@ sub config_wizard {
         closedir(DIR);
     }
     # Open the wizard.
-    if (my $config = Slic3r::GUI::ConfigWizard->new($self, \@profiles)->run) {
-        if (ref($config)) {
+    if (my $result = Slic3r::GUI::ConfigWizard->new($self, \@profiles, $fresh_start)->run) {
+        if ($result->{reset_user_profile}) {
+            eval { wxTheApp->{preset_bundle}->reset(1) };
+        }
+        if (defined $result->{config}) {
             # Wizard returned a config. Add the config to each of the preset types.
             for my $tab (values %{$self->{options_tabs}}) {
                 # Select the first visible preset, force.
                 $tab->select_preset(undef, 1);
             }
             # Load the config over the previously selected defaults.
-            $self->load_config($config);
+            $self->load_config($result->{config});
             for my $tab (values %{$self->{options_tabs}}) {
                 # Save the settings under a new name, select the name.
                 $tab->save_preset('My Settings');
             }
         } else {
             # Wizard returned a name of a preset bundle bundled with the installation. Unpack it.
-            eval { wxTheApp->{preset_bundle}->load_configbundle($directory . '/' . $config . '.ini'); };
+            eval { wxTheApp->{preset_bundle}->load_configbundle($directory . '/' . $result->{preset_name} . '.ini'); };
             Slic3r::GUI::catch_error($self) and return;
             # Load the currently selected preset into the GUI, update the preset selection box.
             foreach my $tab (values %{$self->{options_tabs}}) {
diff --git a/xs/src/slic3r/GUI/Preset.cpp b/xs/src/slic3r/GUI/Preset.cpp
index adc996030b..49c999737c 100644
--- a/xs/src/slic3r/GUI/Preset.cpp
+++ b/xs/src/slic3r/GUI/Preset.cpp
@@ -263,6 +263,21 @@ PresetCollection::~PresetCollection()
     m_bitmap_main_frame = nullptr;
 }
 
+void PresetCollection::reset(bool delete_files)
+{
+    if (m_presets.size() > 1) {
+        if (delete_files) {
+            // Erase the preset files.
+            for (Preset &preset : m_presets)
+                if (! preset.is_default && ! preset.is_external)
+                    boost::nowide::remove(preset.file.c_str());
+        }
+        // Don't use m_presets.resize() here as it requires a default constructor for Preset.
+        m_presets.erase(m_presets.begin() + 1, m_presets.end());
+        this->select_preset(0);
+    }
+}
+
 // Load all presets found in dir_path.
 // Throws an exception on error.
 void PresetCollection::load_presets(const std::string &dir_path, const std::string &subdir)
@@ -501,9 +516,11 @@ bool PresetCollection::update_dirty_ui(wxBitmapComboBox *ui)
         std::string   preset_name  = Preset::remove_suffix_modified(old_label);
         const Preset *preset       = this->find_preset(preset_name, false);
         assert(preset != nullptr);
-        std::string new_label = preset->is_dirty ? preset->name + g_suffix_modified : preset->name;
-        if (old_label != new_label)
-            ui->SetString(ui_id, wxString::FromUTF8(new_label.c_str()));
+		if (preset != nullptr) {
+			std::string new_label = preset->is_dirty ? preset->name + g_suffix_modified : preset->name;
+			if (old_label != new_label)
+				ui->SetString(ui_id, wxString::FromUTF8(new_label.c_str()));
+		}
     }
     return was_dirty != is_dirty;
 }
diff --git a/xs/src/slic3r/GUI/Preset.hpp b/xs/src/slic3r/GUI/Preset.hpp
index bfb7d6e202..b379820175 100644
--- a/xs/src/slic3r/GUI/Preset.hpp
+++ b/xs/src/slic3r/GUI/Preset.hpp
@@ -116,6 +116,8 @@ public:
     PresetCollection(Preset::Type type, const std::vector<std::string> &keys);
     ~PresetCollection();
 
+    void            reset(bool delete_files);
+
     Preset::Type    type() const { return m_type; }
     std::string     name() const;
     const std::deque<Preset>& operator()() const { return m_presets; }
diff --git a/xs/src/slic3r/GUI/PresetBundle.cpp b/xs/src/slic3r/GUI/PresetBundle.cpp
index 4dc2e56ce2..6454775415 100644
--- a/xs/src/slic3r/GUI/PresetBundle.cpp
+++ b/xs/src/slic3r/GUI/PresetBundle.cpp
@@ -69,6 +69,16 @@ PresetBundle::~PresetBundle()
         delete bitmap.second;
 }
 
+void PresetBundle::reset(bool delete_files)
+{
+    // Clear the existing presets, delete their respective files.
+    this->prints   .reset(delete_files);
+    this->filaments.reset(delete_files);
+    this->printers .reset(delete_files);
+    this->filament_presets.clear();
+    this->filament_presets.emplace_back(this->filaments.get_selected_preset().name);
+}
+
 void PresetBundle::setup_directories()
 {
     boost::filesystem::path data_dir = boost::filesystem::path(Slic3r::data_dir());
@@ -376,7 +386,8 @@ void PresetBundle::load_config_file_config_bundle(const std::string &path, const
 {
     // 1) Load the config bundle into a temp data.
     PresetBundle tmp_bundle;
-    tmp_bundle.load_configbundle(path);
+    // Load the config bundle, don't save the loaded presets to user profile directory.
+    tmp_bundle.load_configbundle(path, 0);
     std::string bundle_name = std::string(" - ") + boost::filesystem::path(path).filename().string();
 
     // 2) Extract active configs from the config bundle, copy them and activate them in this bundle.
@@ -430,8 +441,11 @@ void PresetBundle::load_config_file_config_bundle(const std::string &path, const
 
 // Load a config bundle file, into presets and store the loaded presets into separate files
 // of the local configuration directory.
-size_t PresetBundle::load_configbundle(const std::string &path)
+size_t PresetBundle::load_configbundle(const std::string &path, unsigned int flags)
 {
+    if (flags & LOAD_CFGBNDLE_RESET_USER_PROFILE)
+        this->reset(flags & LOAD_CFGBNDLE_SAVE);
+
     // 1) Read the complete config file into a boost::property_tree.
     namespace pt = boost::property_tree;
     pt::ptree tree;
@@ -504,7 +518,9 @@ size_t PresetBundle::load_configbundle(const std::string &path)
 #endif
                 / presets->name() / file_name).make_preferred();
             // Load the preset into the list of presets, save it to disk.
-            presets->load_preset(file_path.string(), preset_name, std::move(config), false).save();
+            Preset &loaded = presets->load_preset(file_path.string(), preset_name, std::move(config), false);
+            if (flags & LOAD_CFGBNDLE_SAVE)
+                loaded.save();
             ++ presets_loaded;
         }
     }
diff --git a/xs/src/slic3r/GUI/PresetBundle.hpp b/xs/src/slic3r/GUI/PresetBundle.hpp
index 238e7c802b..308785fdab 100644
--- a/xs/src/slic3r/GUI/PresetBundle.hpp
+++ b/xs/src/slic3r/GUI/PresetBundle.hpp
@@ -15,6 +15,10 @@ public:
     PresetBundle();
     ~PresetBundle();
 
+    // Remove all the presets but the "-- default --".
+    // Optionally remove all the files referenced by the presets from the user profile directory.
+    void            reset(bool delete_files);
+
     void            setup_directories();
 
     // Load ini files of all types (print, filament, printer) from Slic3r::data_dir() / presets.
@@ -51,7 +55,14 @@ public:
     // Load settings into the provided settings instance.
     // Activate the presets stored in the config bundle.
     // Returns the number of presets loaded successfully.
-    size_t                      load_configbundle(const std::string &path);
+    enum { 
+        // Save the profiles, which have been loaded.
+        LOAD_CFGBNDLE_SAVE = 1, 
+        // Delete all old config profiles before loading.
+        LOAD_CFGBNDLE_RESET_USER_PROFILE = 2
+    };
+    // Load the config bundle, store it to the user profile directory by default.
+    size_t                      load_configbundle(const std::string &path, unsigned int flags = LOAD_CFGBNDLE_SAVE);
 
     // Export a config bundle file containing all the presets and the names of the active presets.
     void                        export_configbundle(const std::string &path); // , const DynamicPrintConfig &settings);
diff --git a/xs/xsp/GUI_Preset.xsp b/xs/xsp/GUI_Preset.xsp
index 905ff4ecde..ed5db01e9e 100644
--- a/xs/xsp/GUI_Preset.xsp
+++ b/xs/xsp/GUI_Preset.xsp
@@ -100,6 +100,8 @@ PresetCollection::arrayref()
     PresetBundle();
     ~PresetBundle();
 
+    void                        reset(bool delete_files);
+
     void                        setup_directories()
         %code%{
             try {
@@ -128,7 +130,7 @@ PresetCollection::arrayref()
     size_t                      load_configbundle(const char *path)
         %code%{
             try {
-                RETVAL = THIS->load_configbundle(path);
+                RETVAL = THIS->load_configbundle(path, PresetBundle::LOAD_CFGBNDLE_SAVE);
             } catch (std::exception& e) {
                 croak("Loading of a config bundle %s failed:\n%s\n", path, e.what());
             }