diff --git a/src/slic3r/GUI/MainFrame.cpp b/src/slic3r/GUI/MainFrame.cpp
index a8a7e5c86..8868b0445 100644
--- a/src/slic3r/GUI/MainFrame.cpp
+++ b/src/slic3r/GUI/MainFrame.cpp
@@ -33,8 +33,8 @@ namespace Slic3r {
 namespace GUI {
 
 MainFrame::MainFrame() :
-DPIFrame(NULL, wxID_ANY, wxString(SLIC3R_BUILD_ID) + " " + _(L("based on Slic3r")), wxDefaultPosition, wxDefaultSize, wxDEFAULT_FRAME_STYLE, "mainframe"),
-        m_printhost_queue_dlg(new PrintHostQueueDialog(this))
+DPIFrame(NULL, wxID_ANY, "", wxDefaultPosition, wxDefaultSize, wxDEFAULT_FRAME_STYLE, "mainframe"),
+    m_printhost_queue_dlg(new PrintHostQueueDialog(this))
 {
     // Fonts were created by the DPIFrame constructor for the monitor, on which the window opened.
     wxGetApp().update_fonts(this);
@@ -95,6 +95,8 @@ DPIFrame(NULL, wxID_ANY, wxString(SLIC3R_BUILD_ID) + " " + _(L("based on Slic3r"
 #endif
     Layout();
 
+    update_title();
+
     // declare events
     Bind(wxEVT_CLOSE_WINDOW, [this](wxCloseEvent& event) {
         if (event.CanVeto() && !wxGetApp().check_unsaved_changes()) {
@@ -136,6 +138,19 @@ DPIFrame(NULL, wxID_ANY, wxString(SLIC3R_BUILD_ID) + " " + _(L("based on Slic3r"
     update_ui_from_settings();    // FIXME (?)
 }
 
+void MainFrame::update_title()
+{
+    wxString title = wxEmptyString;
+    if (m_plater != nullptr)
+    {
+        wxString project = from_path(into_path(m_plater->get_project_filename()).filename());
+        if (!project.empty())
+            title += (project + " - ");
+    }
+    title += (wxString(SLIC3R_BUILD_ID) + " " + _(L("based on Slic3r")));
+
+    SetTitle(title);
+}
 
 void MainFrame::init_tabpanel()
 {
@@ -206,6 +221,11 @@ void MainFrame::add_created_tab(Tab* panel)
         m_tabpanel->AddPage(panel, panel->title());
 }
 
+bool MainFrame::can_start_new_project() const
+{
+    return (m_plater != nullptr) && !m_plater->model().objects.empty();
+}
+
 bool MainFrame::can_save() const
 {
     return (m_plater != nullptr) && !m_plater->model().objects.empty();
@@ -282,6 +302,11 @@ bool MainFrame::can_delete_all() const
     return (m_plater != nullptr) && !m_plater->model().objects.empty();
 }
 
+bool MainFrame::can_reslice() const
+{
+    return (m_plater != nullptr) && !m_plater->model().objects.empty();
+}
+
 void MainFrame::on_dpi_changed(const wxRect &suggested_rect)
 {
     wxGetApp().update_fonts();
@@ -347,7 +372,8 @@ void MainFrame::init_menubar()
     wxMenu* fileMenu = new wxMenu;
     {
         append_menu_item(fileMenu, wxID_ANY, _(L("&New Project")) + "\tCtrl+N", _(L("Start a new project")),
-            [this](wxCommandEvent&) { if (m_plater) m_plater->new_project(); }, "");
+            [this](wxCommandEvent&) { if (m_plater) m_plater->new_project(); }, "", nullptr,
+            [this](){return m_plater != nullptr && can_start_new_project(); }, this);
         append_menu_item(fileMenu, wxID_ANY, _(L("&Open Project")) + dots + "\tCtrl+O", _(L("Open a project file")),
             [this](wxCommandEvent&) { if (m_plater) m_plater->load_project(); }, menu_icon("open"), nullptr,
             [this](){return m_plater != nullptr; }, this);
@@ -421,7 +447,8 @@ void MainFrame::init_menubar()
         fileMenu->AppendSeparator();
 #endif
         m_menu_item_reslice_now = append_menu_item(fileMenu, wxID_ANY, _(L("(Re)Slice No&w")) + "\tCtrl+R", _(L("Start new slicing process")),
-            [this](wxCommandEvent&) { reslice_now(); }, menu_icon("re_slice"));
+            [this](wxCommandEvent&) { reslice_now(); }, menu_icon("re_slice"), nullptr,
+            [this](){return m_plater != nullptr && can_reslice(); }, this);
         fileMenu->AppendSeparator();
         append_menu_item(fileMenu, wxID_ANY, _(L("&Repair STL file")) + dots, _(L("Automatically repair an STL file")),
             [this](wxCommandEvent&) { repair_stl(); }, menu_icon("wrench"));
@@ -1038,6 +1065,5 @@ std::string MainFrame::get_dir_name(const wxString &full_name) const
     return boost::filesystem::path(full_name.wx_str()).parent_path().string();
 }
 
-
 } // GUI
 } // Slic3r
diff --git a/src/slic3r/GUI/MainFrame.hpp b/src/slic3r/GUI/MainFrame.hpp
index b5d875cbf..a5de94738 100644
--- a/src/slic3r/GUI/MainFrame.hpp
+++ b/src/slic3r/GUI/MainFrame.hpp
@@ -61,6 +61,7 @@ class MainFrame : public DPIFrame
     void on_presets_changed(SimpleEvent&);
     void on_value_changed(wxCommandEvent&);
 
+    bool can_start_new_project() const;
     bool can_save() const;
     bool can_export_model() const;
     bool can_export_supports() const;
@@ -71,6 +72,7 @@ class MainFrame : public DPIFrame
     bool can_deselect() const;
     bool can_delete() const;
     bool can_delete_all() const;
+    bool can_reslice() const;
 
     // MenuBar items changeable in respect to printer technology 
     enum MenuItems
@@ -91,6 +93,8 @@ public:
 
     Plater*     plater() { return m_plater; }
 
+    void        update_title();
+
     void        init_tabpanel();
     void        create_preset_tabs();
     void        add_created_tab(Tab* panel);
diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index 572b25c16..0e45f13ce 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -1216,8 +1216,6 @@ struct Plater::priv
     GLToolbar view_toolbar;
     Preview *preview;
 
-    wxString project_filename;
-
     BackgroundSlicingProcess    background_process;
     bool                        arranging;
     bool                        rotoptimizing;
@@ -1342,6 +1340,9 @@ struct Plater::priv
 
     void msw_rescale_object_menu();
 
+    const wxString& get_project_filename() const;
+    void set_project_filename(const wxString& filename);
+
 private:
     bool init_object_menu();
     bool init_common_menu(wxMenu* menu, const bool is_part = false);
@@ -1355,6 +1356,8 @@ private:
 
     void update_fff_scene();
     void update_sla_scene();
+
+    wxString m_project_filename;
 };
 
 const std::regex Plater::priv::pattern_bundle(".*[.](amf|amf[.]xml|zip[.]amf|3mf|prusa)", std::regex::icase);
@@ -1381,12 +1384,12 @@ Plater::priv::priv(Plater *q, MainFrame *main_frame)
         }))
     , sidebar(new Sidebar(q))
     , delayed_scene_refresh(false)
-    , project_filename(wxEmptyString)
 #if ENABLE_SVG_ICONS
     , view_toolbar(GLToolbar::Radio, "View")
 #else
     , view_toolbar(GLToolbar::Radio)
 #endif // ENABLE_SVG_ICONS
+    , m_project_filename(wxEmptyString)
 {
 	this->q->SetFont(Slic3r::GUI::wxGetApp().normal_font());
 
@@ -1930,13 +1933,20 @@ wxString Plater::priv::get_export_file(GUI::FileType file_type)
     int obj_idx = selection.get_object_idx();
 
     fs::path output_file;
-    // first try to get the file name from the current selection
-    if ((0 <= obj_idx) && (obj_idx < (int)this->model.objects.size()))
-        output_file = this->model.objects[obj_idx]->get_export_filename();
+    if (file_type == FT_3MF)
+        // for 3mf take the path from the project filename, if any
+        output_file = into_path(get_project_filename());
 
     if (output_file.empty())
-        // Find the file name of the first printable object.
-        output_file = this->model.propose_export_file_name_and_path();
+    {
+        // first try to get the file name from the current selection
+        if ((0 <= obj_idx) && (obj_idx < (int)this->model.objects.size()))
+            output_file = this->model.objects[obj_idx]->get_export_filename();
+
+        if (output_file.empty())
+            // Find the file name of the first printable object.
+            output_file = this->model.propose_export_file_name_and_path();
+    }
 
     wxString dlg_title;
     switch (file_type) {
@@ -2064,7 +2074,7 @@ void Plater::priv::delete_object_from_model(size_t obj_idx)
 
 void Plater::priv::reset()
 {
-    project_filename.Clear();
+    set_project_filename(wxEmptyString);
 
     // Prevent toolpaths preview from rendering while we modify the Print object
     preview->set_enabled(false);
@@ -2932,6 +2942,17 @@ void Plater::priv::msw_rescale_object_menu()
         msw_rescale_menu(dynamic_cast<wxMenu*>(menu));
 }
 
+const wxString& Plater::priv::get_project_filename() const
+{
+    return m_project_filename;
+}
+
+void Plater::priv::set_project_filename(const wxString& filename)
+{
+    m_project_filename = filename;
+    wxGetApp().mainframe->update_title();
+}
+
 bool Plater::priv::init_common_menu(wxMenu* menu, const bool is_part/* = false*/)
 {
     if (is_part) {
@@ -3243,6 +3264,7 @@ SLAPrint&       Plater::sla_print()         { return p->sla_print; }
 
 void Plater::new_project()
 {
+    wxPostEvent(p->view3D->get_wxglcanvas(), SimpleEvent(EVT_GLTOOLBAR_DELETE_ALL));
 }
 
 void Plater::load_project()
@@ -3254,7 +3276,7 @@ void Plater::load_project()
         return;
 
     p->reset();
-    p->project_filename = input_file;
+    p->set_project_filename(input_file);
 
     std::vector<fs::path> input_paths;
     input_paths.push_back(into_path(input_file));
@@ -3608,7 +3630,9 @@ void Plater::export_3mf(const boost::filesystem::path& output_path)
     if (Slic3r::store_3mf(path_u8.c_str(), &p->model, export_config ? &cfg : nullptr)) {
         // Success
         p->statusbar()->set_status_text(wxString::Format(_(L("3MF file exported to %s")), path));
-    } else {
+        p->set_project_filename(path);
+    }
+    else {
         // Failure
         p->statusbar()->set_status_text(wxString::Format(_(L("Error exporting 3MF file %s")), path));
     }
@@ -3801,7 +3825,7 @@ void Plater::on_activate()
 
 const wxString& Plater::get_project_filename() const
 {
-    return p->project_filename;
+    return p->get_project_filename();
 }
 
 bool Plater::is_export_gcode_scheduled() const