diff --git a/xs/src/slic3r/AppController.hpp b/xs/src/slic3r/AppController.hpp
index 6633cf2b69..6cec1b706d 100644
--- a/xs/src/slic3r/AppController.hpp
+++ b/xs/src/slic3r/AppController.hpp
@@ -94,7 +94,9 @@ protected:
         unsigned long height_px = 2560;
         double width_mm = 68.0, height_mm = 120.0;
         double corr = 1.0;
-    } query_png_export_data();
+    };
+
+    PngExportData query_png_export_data();
 
     PngExportData prev_expdata_;
 
@@ -105,7 +107,7 @@ public:
     explicit inline PrintController(Print *print): print_(print) {}
 
     inline static Ptr create(Print *print) {
-        return std::make_unique<PrintController>(print);
+        return PrintController::Ptr( new PrintController(print) );
     }
 
     void slice(PrintObject *pobj);
diff --git a/xs/src/slic3r/GUI/PngExportDialog.cpp b/xs/src/slic3r/GUI/PngExportDialog.cpp
index 18ac418eaa..26d18e0ea5 100644
--- a/xs/src/slic3r/GUI/PngExportDialog.cpp
+++ b/xs/src/slic3r/GUI/PngExportDialog.cpp
@@ -53,7 +53,7 @@ PngExportDialog::PngExportDialog( wxWindow* parent, wxWindowID id, const wxStrin
     wxBoxSizer* filepick_layout_;
     filepick_layout_ = new wxBoxSizer( wxHORIZONTAL );
 
-    filepick_ctl_ = new wxFilePickerCtrl( this, wxID_ANY, wxEmptyString, _("Select a file"), wxT("*.zip"), wxDefaultPosition, wxSize( 308,-1 ), wxFLP_DEFAULT_STYLE, wxDefaultValidator, wxT("filepick_ctl") );
+    filepick_ctl_ = new wxFilePickerCtrl( this, wxID_ANY, wxEmptyString, _("Select a file"), wxT("*.zip"), wxDefaultPosition, wxSize( 308,-1 ), wxFLP_USE_TEXTCTRL | wxFLP_SAVE | wxFLP_OVERWRITE_PROMPT, wxDefaultValidator, wxT("filepick_ctl") );
     filepick_layout_->Add( filepick_ctl_, 0, wxALIGN_CENTER|wxALIGN_LEFT|wxALL, 5 );