diff --git a/resources/profiles/QIDITechnology/X-MAX 3_bed.STL b/resources/profiles/QIDITechnology/X-MAX 3_bed.stl
similarity index 100%
rename from resources/profiles/QIDITechnology/X-MAX 3_bed.STL
rename to resources/profiles/QIDITechnology/X-MAX 3_bed.stl
diff --git a/resources/profiles/QIDITechnology/X-Plus 3_bed.STL b/resources/profiles/QIDITechnology/X-Plus 3_bed.stl
similarity index 100%
rename from resources/profiles/QIDITechnology/X-Plus 3_bed.STL
rename to resources/profiles/QIDITechnology/X-Plus 3_bed.stl
diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index d0f5289..8bf45dc 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -831,7 +831,7 @@ void GUI_App::post_init()
             // preset_updater->sync downloads profile updates on background so it must begin after config wizard finished.
             bool cw_showed = this->config_wizard_startup();
             this->preset_updater->sync(preset_bundle, this);
-            //B52
+            //B57
             //if (! cw_showed) {
             //    // The CallAfter is needed as well, without it, GL extensions did not show.
             //    // Also, we only want to show this when the wizard does not, so the new user
diff --git a/src/slic3r/GUI/OptionsGroup.cpp b/src/slic3r/GUI/OptionsGroup.cpp
index 7766722..7ce73b7 100644
--- a/src/slic3r/GUI/OptionsGroup.cpp
+++ b/src/slic3r/GUI/OptionsGroup.cpp
@@ -618,7 +618,11 @@ void ConfigOptionsGroup::back_to_sys_value(const std::string& opt_key)
 void ConfigOptionsGroup::back_to_config_value(const DynamicPrintConfig& config, const std::string& opt_key)
 {
 	boost::any value;
+    //B52
 	if (opt_key == "bed_shape") {
+        value = get_config_value(config, "bed_exclude_area");
+        this->change_opt_value("bed_exclude_area", value);
+        OptionsGroup::on_change_OG("bed_exclude_area", value);
         for (const std::string& key : {"bed_custom_texture", "bed_custom_model"}) {
             value = config.opt_string(key);
             this->change_opt_value(key, value);
diff --git a/src/slic3r/GUI/Tab.cpp b/src/slic3r/GUI/Tab.cpp
index 81d5d9f..397145d 100644
--- a/src/slic3r/GUI/Tab.cpp
+++ b/src/slic3r/GUI/Tab.cpp
@@ -629,8 +629,9 @@ void Tab::update_changed_ui()
         {
             auto check_bed_custom_options = [](std::vector<std::string>& keys) {
                 size_t old_keys_size = keys.size();
+                //B52
                 keys.erase(std::remove_if(keys.begin(), keys.end(), [](const std::string& key) { 
-                    return key == "bed_custom_texture" || key == "bed_custom_model"; }), keys.end());
+                    return key == "bed_custom_texture" || key == "bed_custom_model" || key == "bed_exclude_area"; }), keys.end());
                 if (old_keys_size != keys.size() && std::find(keys.begin(), keys.end(), "bed_shape") == keys.end())
                     keys.emplace_back("bed_shape");
             };
diff --git a/tests/fff_print/test_perimeters.cpp b/tests/fff_print/test_perimeters.cpp
index 7b18261..42bbf9e 100644
--- a/tests/fff_print/test_perimeters.cpp
+++ b/tests/fff_print/test_perimeters.cpp
@@ -45,6 +45,8 @@ SCENARIO("Perimeter nesting", "[Perimeters]")
         ExtrusionEntityCollection loops;
         ExtrusionEntityCollection gap_fill;
         ExPolygons                fill_expolygons;
+        //B56
+        ExPolygons                fill_expolygons_no_overlap;
         Flow                      flow(1., 1., 1.);
         PerimeterGenerator::Parameters perimeter_generator_params(
             1., // layer height
@@ -61,6 +63,7 @@ SCENARIO("Perimeter nesting", "[Perimeters]")
 //        if (config.perimeter_generator == PerimeterGeneratorType::Arachne)
 //            PerimeterGenerator::process_arachne();
 //        else
+            //B56
             PerimeterGenerator::process_classic(
                 // input:
                 perimeter_generator_params,
@@ -71,7 +74,7 @@ SCENARIO("Perimeter nesting", "[Perimeters]")
                 upper_layer_polygons_cache,
                 lower_layer_polygons_cache,
                 // output:
-                loops, gap_fill, fill_expolygons);
+                loops, gap_fill, fill_expolygons,fill_expolygons_no_overlap);
 
         THEN("expected number of collections") {
             REQUIRE(loops.entities.size() == data.expolygons.size());