diff --git a/src/libslic3r/Preset.cpp b/src/libslic3r/Preset.cpp
index 182cf1193..421a1f39e 100644
--- a/src/libslic3r/Preset.cpp
+++ b/src/libslic3r/Preset.cpp
@@ -1457,7 +1457,7 @@ void PhysicalPrinter::update_from_preset(const Preset& preset)
 {
     config.apply_only(preset.config, printer_options(), true);
     // add preset names to the options list
-    auto ret = preset_names.emplace(preset.name);
+    preset_names.emplace(preset.name);
     update_preset_names_in_config();
 }
 
@@ -1676,7 +1676,7 @@ std::deque<PhysicalPrinter>::iterator PhysicalPrinterCollection::find_printer_in
 
     std::string low_name = boost::to_lower_copy<std::string>(name);
 
-    int i = 0;
+    size_t i = 0;
     for (const PhysicalPrinter& printer : m_printers) {
         if (boost::to_lower_copy<std::string>(printer.name) == low_name)
             break;
@@ -1866,7 +1866,7 @@ void PhysicalPrinterCollection::unselect_printer()
 
 bool PhysicalPrinterCollection::is_selected(PhysicalPrinterCollection::ConstIterator it, const std::string& preset_name) const
 {
-    return  m_idx_selected      == it - m_printers.begin() && 
+    return  m_idx_selected      == size_t(it - m_printers.begin()) && 
             m_selected_preset   == preset_name;
 }
 
diff --git a/src/slic3r/GUI/ExtraRenderers.hpp b/src/slic3r/GUI/ExtraRenderers.hpp
index de013e9d2..6593963b7 100644
--- a/src/slic3r/GUI/ExtraRenderers.hpp
+++ b/src/slic3r/GUI/ExtraRenderers.hpp
@@ -141,8 +141,8 @@ public:
         , int align = wxALIGN_LEFT | wxALIGN_CENTER_VERTICAL
     ) : wxDataViewCustomRenderer(wxT("DataViewBitmapText"), mode, align) {}
 
-    bool SetValue(const wxVariant& value);
-    bool GetValue(wxVariant& value) const;
+    bool SetValue(const wxVariant& value) override;
+    bool GetValue(wxVariant& value) const override;
 
     virtual bool Render(wxRect cell, wxDC* dc, int state) override;
     virtual wxSize GetSize() const override;
diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index da25ef1ab..5312a0fce 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -1583,6 +1583,8 @@ bool GUI_App::check_unsaved_changes(const wxString &header)
             // if we saved changes to the new presets, we should to 
             // synchronize config.ini with the current selections.
             preset_bundle->export_selections(*app_config);
+
+            wxMessageBox(_L("The preset(s) modifications are successfully saved"));
         }
     }
 
diff --git a/src/slic3r/GUI/MainFrame.cpp b/src/slic3r/GUI/MainFrame.cpp
index b43786968..32dd584e5 100644
--- a/src/slic3r/GUI/MainFrame.cpp
+++ b/src/slic3r/GUI/MainFrame.cpp
@@ -1057,14 +1057,14 @@ void MainFrame::init_menubar()
         import_menu->AppendSeparator();
         append_menu_item(import_menu, wxID_ANY, _L("Import &Config") + dots + "\tCtrl+L", _L("Load exported configuration file"),
             [this](wxCommandEvent&) { load_config_file(); }, "import_config", nullptr,
-            [this]() {return true; }, this);
+            []() {return true; }, this);
         append_menu_item(import_menu, wxID_ANY, _L("Import Config from &project") + dots +"\tCtrl+Alt+L", _L("Load configuration from project file"),
             [this](wxCommandEvent&) { if (m_plater) m_plater->extract_config_from_project(); }, "import_config", nullptr,
-            [this]() {return true; }, this);
+            []() {return true; }, this);
         import_menu->AppendSeparator();
         append_menu_item(import_menu, wxID_ANY, _L("Import Config &Bundle") + dots, _L("Load presets from a bundle"),
             [this](wxCommandEvent&) { load_configbundle(); }, "import_config_bundle", nullptr,
-            [this]() {return true; }, this);
+            []() {return true; }, this);
         append_submenu(fileMenu, import_menu, wxID_ANY, _L("&Import"), "");
 
         wxMenu* export_menu = new wxMenu();
@@ -1096,13 +1096,13 @@ void MainFrame::init_menubar()
         export_menu->AppendSeparator();
         append_menu_item(export_menu, wxID_ANY, _L("Export &Config") + dots +"\tCtrl+E", _L("Export current configuration to file"),
             [this](wxCommandEvent&) { export_config(); }, "export_config", nullptr,
-            [this]() {return true; }, this);
+            []() {return true; }, this);
         append_menu_item(export_menu, wxID_ANY, _L("Export Config &Bundle") + dots, _L("Export all presets to file"),
             [this](wxCommandEvent&) { export_configbundle(); }, "export_config_bundle", nullptr,
-            [this]() {return true; }, this);
+            []() {return true; }, this);
         append_menu_item(export_menu, wxID_ANY, _L("Export Config Bundle With Physical Printers") + dots, _L("Export all presets including physical printers to file"),
             [this](wxCommandEvent&) { export_configbundle(true); }, "export_config_bundle", nullptr,
-            [this]() {return true; }, this);
+            []() {return true; }, this);
         append_submenu(fileMenu, export_menu, wxID_ANY, _L("&Export"), "");
 
 		append_menu_item(fileMenu, wxID_ANY, _L("Ejec&t SD card / Flash drive") + dots + "\tCtrl+T", _L("Eject SD card / Flash drive after the G-code was exported to it."),
@@ -1139,7 +1139,7 @@ void MainFrame::init_menubar()
         fileMenu->AppendSeparator();
         append_menu_item(fileMenu, wxID_ANY, _L("&Repair STL file") + dots, _L("Automatically repair an STL file"),
             [this](wxCommandEvent&) { repair_stl(); }, "wrench", nullptr,
-            [this]() { return true; }, this);
+            []() { return true; }, this);
         fileMenu->AppendSeparator();
         append_menu_item(fileMenu, wxID_ANY, _L("&G-code preview") + dots, _L("Open G-code viewer"),
             [this](wxCommandEvent&) { start_new_gcodeviewer_open_file(this); }, "", nullptr);
@@ -1209,7 +1209,7 @@ void MainFrame::init_menubar()
         editMenu->AppendSeparator();
         append_menu_item(editMenu, wxID_ANY, _L("Searc&h") + "\tCtrl+F",
             _L("Find option"), [this](wxCommandEvent&) { m_plater->search(/*m_tabpanel->GetCurrentPage() == */m_plater->IsShown()); },
-            "search", nullptr, [this]() {return true; }, this);
+            "search", nullptr, []() {return true; }, this);
     }
 
     // Window menu
@@ -1218,19 +1218,19 @@ void MainFrame::init_menubar()
         if (m_plater) {
             append_menu_item(windowMenu, wxID_HIGHEST + 1, _L("&Plater Tab") + "\tCtrl+1", _L("Show the plater"),
                 [this](wxCommandEvent&) { select_tab(size_t(0)); }, "plater", nullptr,
-                [this]() {return true; }, this);
+                []() {return true; }, this);
             windowMenu->AppendSeparator();
         }
         append_menu_item(windowMenu, wxID_HIGHEST + 2, _L("P&rint Settings Tab") + "\tCtrl+2", _L("Show the print settings"),
             [this/*, tab_offset*/](wxCommandEvent&) { select_tab(1); }, "cog", nullptr,
-            [this]() {return true; }, this);
+            []() {return true; }, this);
         wxMenuItem* item_material_tab = append_menu_item(windowMenu, wxID_HIGHEST + 3, _L("&Filament Settings Tab") + "\tCtrl+3", _L("Show the filament settings"),
             [this/*, tab_offset*/](wxCommandEvent&) { select_tab(2); }, "spool", nullptr,
-            [this]() {return true; }, this);
+            []() {return true; }, this);
         m_changeable_menu_items.push_back(item_material_tab);
         wxMenuItem* item_printer_tab = append_menu_item(windowMenu, wxID_HIGHEST + 4, _L("Print&er Settings Tab") + "\tCtrl+4", _L("Show the printer settings"),
             [this/*, tab_offset*/](wxCommandEvent&) { select_tab(3); }, "printer", nullptr,
-            [this]() {return true; }, this);
+            []() {return true; }, this);
         m_changeable_menu_items.push_back(item_printer_tab);
         if (m_plater) {
             windowMenu->AppendSeparator();
@@ -1259,7 +1259,7 @@ void MainFrame::init_menubar()
 
         windowMenu->AppendSeparator();
         append_menu_item(windowMenu, wxID_ANY, _L("Print &Host Upload Queue") + "\tCtrl+J", _L("Display the Print Host Upload Queue window"),
-            [this](wxCommandEvent&) { m_printhost_queue_dlg->Show(); }, "upload_queue", nullptr, [this]() {return true; }, this);
+            [this](wxCommandEvent&) { m_printhost_queue_dlg->Show(); }, "upload_queue", nullptr, []() {return true; }, this);
         
         windowMenu->AppendSeparator();
         append_menu_item(windowMenu, wxID_ANY, _(L("Open new instance")) + "\tCtrl+I", _(L("Open a new PrusaSlicer instance")),
@@ -1298,7 +1298,7 @@ void MainFrame::init_menubar()
             [this]() { return m_plater->is_view3D_shown(); }, [this]() { return m_plater->are_view3D_labels_shown(); }, this);
         append_menu_check_item(viewMenu, wxID_ANY, _L("&Collapse sidebar"), _L("Collapse sidebar"),
             [this](wxCommandEvent&) { m_plater->collapse_sidebar(!m_plater->is_sidebar_collapsed()); }, this,
-            [this]() { return true; }, [this]() { return m_plater->is_sidebar_collapsed(); }, this);
+            []() { return true; }, [this]() { return m_plater->is_sidebar_collapsed(); }, this);
     }
 
     // Help menu
diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index 99c572d73..9a5170387 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -449,7 +449,7 @@ FreqChangedParams::FreqChangedParams(wxWindow* parent) :
     DynamicPrintConfig*	config_sla = &wxGetApp().preset_bundle->sla_prints.get_edited_preset().config;
     m_og_sla->set_config(config_sla);
 
-    m_og_sla->m_on_change = [config_sla, this](t_config_option_key opt_key, boost::any value) {
+    m_og_sla->m_on_change = [config_sla](t_config_option_key opt_key, boost::any value) {
         Tab* tab = wxGetApp().get_tab(Preset::TYPE_SLA_PRINT);
         if (!tab) return;