diff --git a/cura/CuraApplication.py b/cura/CuraApplication.py
index b825e456c2..9261f0df1a 100755
--- a/cura/CuraApplication.py
+++ b/cura/CuraApplication.py
@@ -279,6 +279,11 @@ class CuraApplication(QtApplication):
         # We need them to simplify the switching between materials.
         empty_container = ContainerRegistry.getInstance().getEmptyInstanceContainer()
 
+        empty_definition_changes_container = copy.deepcopy(empty_container)
+        empty_definition_changes_container.setMetaDataEntry("id", "empty_definition_changes")
+        empty_definition_changes_container.addMetaDataEntry("type", "definition_changes")
+        ContainerRegistry.getInstance().addContainer(empty_definition_changes_container)
+
         empty_variant_container = copy.deepcopy(empty_container)
         empty_variant_container.setMetaDataEntry("id", "empty_variant")
         empty_variant_container.addMetaDataEntry("type", "variant")
diff --git a/cura/Settings/CuraContainerRegistry.py b/cura/Settings/CuraContainerRegistry.py
index b945ec0609..4567226060 100644
--- a/cura/Settings/CuraContainerRegistry.py
+++ b/cura/Settings/CuraContainerRegistry.py
@@ -245,6 +245,9 @@ class CuraContainerRegistry(ContainerRegistry):
 
                 return {"status": "ok", "message": catalog.i18nc("@info:status", "Successfully imported profile {0}", profile_or_list[0].getName())}
 
+            # This message is throw when the profile reader doesn't find any profile in the file
+            return {"status": "error", "message": catalog.i18nc("@info:status", "File {0} does not contain any valid profile.", file_name)}
+
         # If it hasn't returned by now, none of the plugins loaded the profile successfully.
         return {"status": "error", "message": catalog.i18nc("@info:status", "Profile {0} has an unknown file type or is corrupted.", file_name)}
 
diff --git a/cura/Settings/CuraStackBuilder.py b/cura/Settings/CuraStackBuilder.py
index 8d2d66ea87..608a13c600 100644
--- a/cura/Settings/CuraStackBuilder.py
+++ b/cura/Settings/CuraStackBuilder.py
@@ -63,6 +63,7 @@ class CuraStackBuilder:
                 next_stack = new_global_stack
             )
             new_global_stack.addExtruder(new_extruder)
+            registry.addContainer(new_extruder)
         else:
             # create extruder stack for each found extruder definition
             for extruder_definition in registry.findDefinitionContainers(machine = machine_definition.id):
@@ -81,6 +82,11 @@ class CuraStackBuilder:
                     next_stack = new_global_stack
                 )
                 new_global_stack.addExtruder(new_extruder)
+                registry.addContainer(new_extruder)
+
+        # Register the global stack after the extruder stacks are created. This prevents the registry from adding another
+        # extruder stack because the global stack didn't have one yet (which is enforced since Cura 3.1).
+        registry.addContainer(new_global_stack)
 
         return new_global_stack
 
@@ -135,9 +141,7 @@ class CuraStackBuilder:
         # Only add the created containers to the registry after we have set all the other
         # properties. This makes the create operation more transactional, since any problems
         # setting properties will not result in incomplete containers being added.
-        registry = ContainerRegistry.getInstance()
-        registry.addContainer(stack)
-        registry.addContainer(user_container)
+        ContainerRegistry.getInstance().addContainer(user_container)
 
         return stack
 
@@ -181,9 +185,7 @@ class CuraStackBuilder:
         if "quality_changes" in kwargs:
             stack.setQualityChangesById(kwargs["quality_changes"])
 
-        registry = ContainerRegistry.getInstance()
-        registry.addContainer(stack)
-        registry.addContainer(user_container)
+        ContainerRegistry.getInstance().addContainer(user_container)
 
         return stack
 
diff --git a/cura/Settings/ExtruderManager.py b/cura/Settings/ExtruderManager.py
index b5f9a35914..6d52ce87fd 100755
--- a/cura/Settings/ExtruderManager.py
+++ b/cura/Settings/ExtruderManager.py
@@ -407,6 +407,12 @@ class ExtruderManager(QObject):
                 extruder_train.setNextStack(global_stack)
                 extruders_changed = True
 
+            # FIX: We have to remove those settings here because we know that those values have been copied to all
+            # the extruders at this point.
+            for key in ("material_diameter", "machine_nozzle_size"):
+                if global_stack.definitionChanges.hasProperty(key, "value"):
+                    global_stack.definitionChanges.removeInstance(key, postpone_emit = True)
+
             if extruders_changed:
                 self.extrudersChanged.emit(global_stack_id)
                 self.extrudersAdded.emit()
diff --git a/cura/Settings/ExtruderStack.py b/cura/Settings/ExtruderStack.py
index 6dffeda6c2..dd03ce7b3b 100644
--- a/cura/Settings/ExtruderStack.py
+++ b/cura/Settings/ExtruderStack.py
@@ -18,10 +18,6 @@ if TYPE_CHECKING:
     from cura.Settings.GlobalStack import GlobalStack
 
 
-_EXTRUDER_SPECIFIC_DEFINITION_CHANGES_SETTINGS = ["machine_nozzle_size",
-                                                  "material_diameter"]
-
-
 ##  Represents an Extruder and its related containers.
 #
 #
@@ -53,20 +49,38 @@ class ExtruderStack(CuraContainerStack):
         # when we are upgrading a definition_changes container file, there is NO guarantee that other files such as
         # machine an extruder stack files are upgraded before this, so we cannot read those files assuming they are in
         # the latest format.
+        #
+        # MORE:
+        # For single-extrusion machines, nozzle size is saved in the global stack, so the nozzle size value should be
+        # carried to the first extruder.
+        # For material diameter, it was supposed to be applied to all extruders, so its value should be copied to all
+        # extruders.
+        #
+        keys_to_copy = ["material_diameter"]  # material diameter will be copied to all extruders
         if self.getMetaDataEntry("position") == "0":
-            for key in _EXTRUDER_SPECIFIC_DEFINITION_CHANGES_SETTINGS:
-                setting_value = stack.definitionChanges.getProperty(key, "value")
-                if setting_value is None:
-                    continue
+            keys_to_copy.append("machine_nozzle_size")
 
-                setting_definition = stack.getSettingDefinition(key)
-                new_instance = SettingInstance(setting_definition, self.definitionChanges)
-                new_instance.setProperty("value", setting_value)
-                new_instance.resetState()  # Ensure that the state is not seen as a user state.
-                self.definitionChanges.addInstance(new_instance)
-                self.definitionChanges.setDirty(True)
+        for key in keys_to_copy:
+            # Only copy the value when this extruder doesn't have the value.
+            if self.definitionChanges.hasProperty(key, "value"):
+                continue
+            setting_value = stack.definitionChanges.getProperty(key, "value")
+            if setting_value is None:
+                continue
 
-                stack.definitionChanges.removeInstance(key, postpone_emit = True)
+            setting_definition = stack.getSettingDefinition(key)
+            new_instance = SettingInstance(setting_definition, self.definitionChanges)
+            new_instance.setProperty("value", setting_value)
+            new_instance.resetState()  # Ensure that the state is not seen as a user state.
+            self.definitionChanges.addInstance(new_instance)
+            self.definitionChanges.setDirty(True)
+
+            # NOTE: We cannot remove the setting from the global stack's definition changes container because for
+            # material diameter, it needs to be applied to all extruders, but here we don't know how many extruders
+            # a machine actually has and how many extruders has already been loaded for that machine, so we have to
+            # keep this setting for any remaining extruders that haven't been loaded yet.
+            #
+            # Those settings will be removed in ExtruderManager which knows all those info.
 
     @override(ContainerStack)
     def getNextStack(self) -> Optional["GlobalStack"]:
diff --git a/cura/Settings/MachineManager.py b/cura/Settings/MachineManager.py
index 309f27b6d7..b98fcccbb2 100755
--- a/cura/Settings/MachineManager.py
+++ b/cura/Settings/MachineManager.py
@@ -3,6 +3,8 @@
 
 #Type hinting.
 from typing import Union, List, Dict
+
+from UM.Scene.Iterator.DepthFirstIterator import DepthFirstIterator
 from UM.Signal import Signal
 
 from PyQt5.QtCore import QObject, pyqtProperty, pyqtSignal, QTimer
@@ -75,6 +77,7 @@ class MachineManager(QObject):
 
         self._stacks_have_errors = None
 
+        self._empty_definition_changes_container = ContainerRegistry.getInstance().findContainers(id = "empty_definition_changes")[0]
         self._empty_variant_container = ContainerRegistry.getInstance().findContainers(id = "empty_variant")[0]
         self._empty_material_container = ContainerRegistry.getInstance().findContainers(id = "empty_material")[0]
         self._empty_quality_container = ContainerRegistry.getInstance().findContainers(id = "empty_quality")[0]
@@ -1348,6 +1351,68 @@ class MachineManager(QObject):
         if containers:
             return containers[0].definition.getId()
 
+    ##  Set the amount of extruders on the active machine (global stack)
+    #   \param extruder_count int the number of extruders to set
+    def setActiveMachineExtruderCount(self, extruder_count):
+        extruder_manager = Application.getInstance().getExtruderManager()
+
+        definition_changes_container = self._global_container_stack.definitionChanges
+        if not self._global_container_stack or definition_changes_container == self._empty_definition_changes_container:
+            return
+
+        previous_extruder_count = self._global_container_stack.getProperty("machine_extruder_count", "value")
+        if extruder_count == previous_extruder_count:
+            return
+
+        # reset all extruder number settings whose value is no longer valid
+        for setting_instance in self._global_container_stack.userChanges.findInstances():
+            setting_key = setting_instance.definition.key
+            if not self._global_container_stack.getProperty(setting_key, "type") in ("extruder", "optional_extruder"):
+                continue
+
+            old_value = int(self._global_container_stack.userChanges.getProperty(setting_key, "value"))
+            if old_value >= extruder_count:
+                self._global_container_stack.userChanges.removeInstance(setting_key)
+                Logger.log("d", "Reset [%s] because its old value [%s] is no longer valid ", setting_key, old_value)
+
+        # Check to see if any objects are set to print with an extruder that will no longer exist
+        root_node = Application.getInstance().getController().getScene().getRoot()
+        for node in DepthFirstIterator(root_node):
+            if node.getMeshData():
+                extruder_nr = node.callDecoration("getActiveExtruderPosition")
+
+                if extruder_nr is not None and int(extruder_nr) > extruder_count - 1:
+                    node.callDecoration("setActiveExtruder", extruder_manager.getExtruderStack(extruder_count - 1).getId())
+
+        definition_changes_container.setProperty("machine_extruder_count", "value", extruder_count)
+
+        # Make sure one of the extruder stacks is active
+        extruder_manager.setActiveExtruderIndex(0)
+
+        # Move settable_per_extruder values out of the global container
+        # After CURA-4482 this should not be the case anymore, but we still want to support older project files.
+        global_user_container = self._global_container_stack.getTop()
+
+        # Make sure extruder_stacks exists
+        extruder_stacks = []
+
+        if previous_extruder_count == 1:
+            extruder_stacks = ExtruderManager.getInstance().getActiveExtruderStacks()
+            global_user_container = self._global_container_stack.getTop()
+
+        for setting_instance in global_user_container.findInstances():
+            setting_key = setting_instance.definition.key
+            settable_per_extruder = self._global_container_stack.getProperty(setting_key, "settable_per_extruder")
+
+            if settable_per_extruder:
+                limit_to_extruder = int(self._global_container_stack.getProperty(setting_key, "limit_to_extruder"))
+                extruder_stack = extruder_stacks[max(0, limit_to_extruder)]
+                extruder_stack.getTop().setProperty(setting_key, "value", global_user_container.getProperty(setting_key, "value"))
+                global_user_container.removeInstance(setting_key)
+
+        # Signal that the global stack has changed
+        Application.getInstance().globalContainerStackChanged.emit()
+
     @staticmethod
     def createMachineManager():
         return MachineManager()
diff --git a/plugins/3MFReader/WorkspaceDialog.qml b/plugins/3MFReader/WorkspaceDialog.qml
index 826b488e02..5418dcef6d 100644
--- a/plugins/3MFReader/WorkspaceDialog.qml
+++ b/plugins/3MFReader/WorkspaceDialog.qml
@@ -390,6 +390,13 @@ UM.Dialog
         }
     }
 
+    function accept() {
+        manager.closeBackend();
+        manager.onOkButtonClicked();
+        base.visible = false;
+        base.accept();
+    }
+
     function reject() {
         manager.onCancelButtonClicked();
         base.visible = false;
diff --git a/plugins/CuraEngineBackend/CuraEngineBackend.py b/plugins/CuraEngineBackend/CuraEngineBackend.py
index 06d38eccd0..7c46b8edaa 100755
--- a/plugins/CuraEngineBackend/CuraEngineBackend.py
+++ b/plugins/CuraEngineBackend/CuraEngineBackend.py
@@ -431,7 +431,6 @@ class CuraEngineBackend(QObject, Backend):
         # cached layer data is removed so the previous data is not rendered - CURA-4821
         if source.callDecoration("isBlockSlicing") and source.callDecoration("getLayerData"):
             if self._stored_optimized_layer_data:
-                print(self._stored_optimized_layer_data)
                 del self._stored_optimized_layer_data[source.callDecoration("getBuildPlateNumber")]
 
         build_plate_changed = set()
diff --git a/plugins/FirmwareUpdateChecker/FirmwareUpdateChecker.py b/plugins/FirmwareUpdateChecker/FirmwareUpdateChecker.py
index 458aca5787..8e4c70517f 100644
--- a/plugins/FirmwareUpdateChecker/FirmwareUpdateChecker.py
+++ b/plugins/FirmwareUpdateChecker/FirmwareUpdateChecker.py
@@ -49,7 +49,6 @@ class FirmwareUpdateChecker(Extension):
     def _onContainerAdded(self, container):
         # Only take care when a new GlobalStack was added
         if isinstance(container, GlobalStack):
-            Logger.log("i", "You have a '%s' in printer list. Let's check the firmware!", container.getId())
             self.checkFirmwareVersion(container, True)
 
     ##  Connect with software.ultimaker.com, load latest.version and check version info.
diff --git a/plugins/FirmwareUpdateChecker/FirmwareUpdateCheckerJob.py b/plugins/FirmwareUpdateChecker/FirmwareUpdateCheckerJob.py
index 6dd7338cfd..fd6c4680e8 100644
--- a/plugins/FirmwareUpdateChecker/FirmwareUpdateCheckerJob.py
+++ b/plugins/FirmwareUpdateChecker/FirmwareUpdateCheckerJob.py
@@ -44,6 +44,8 @@ class FirmwareUpdateCheckerJob(Job):
             # Now we just do that if the active printer is Ultimaker 3 or Ultimaker 3 Extended or any
             # other Ultimaker 3 that will come in the future
             if len(machine_name_parts) >= 2 and machine_name_parts[:2] == ["ultimaker", "3"]:
+                Logger.log("i", "You have a UM3 in printer list. Let's check the firmware!")
+
                 # Nothing to parse, just get the string
                 # TODO: In the future may be done by parsing a JSON file with diferent version for each printer model
                 current_version = reader(current_version_file).readline().rstrip()
diff --git a/plugins/GCodeWriter/GCodeWriter.py b/plugins/GCodeWriter/GCodeWriter.py
index 95c48c4d9e..2dfaf5aef7 100644
--- a/plugins/GCodeWriter/GCodeWriter.py
+++ b/plugins/GCodeWriter/GCodeWriter.py
@@ -107,7 +107,7 @@ class GCodeWriter(MeshWriter):
         prefix_length = len(prefix)
 
         container_with_profile = stack.qualityChanges
-        if not container_with_profile:
+        if container_with_profile.getId() == "empty_quality_changes":
             Logger.log("e", "No valid quality profile found, not writing settings to GCode!")
             return ""
 
@@ -123,9 +123,9 @@ class GCodeWriter(MeshWriter):
         serialized = flat_global_container.serialize()
         data = {"global_quality": serialized}
 
-        for extruder in sorted(ExtruderManager.getInstance().getMachineExtruders(stack.getId()), key = lambda k: k.getMetaDataEntry("position")):
+        for extruder in sorted(stack.extruders.values(), key = lambda k: k.getMetaDataEntry("position")):
             extruder_quality = extruder.qualityChanges
-            if not extruder_quality:
+            if extruder_quality.getId() == "empty_quality_changes":
                 Logger.log("w", "No extruder quality profile found, not writing quality for extruder %s to file!", extruder.getId())
                 continue
             flat_extruder_quality = self._createFlattenedContainerInstance(extruder.getTop(), extruder_quality)
diff --git a/plugins/MachineSettingsAction/MachineSettingsAction.py b/plugins/MachineSettingsAction/MachineSettingsAction.py
index 101ba54ed0..ae1c1663dd 100755
--- a/plugins/MachineSettingsAction/MachineSettingsAction.py
+++ b/plugins/MachineSettingsAction/MachineSettingsAction.py
@@ -105,60 +105,9 @@ class MachineSettingsAction(MachineAction):
 
     @pyqtSlot(int)
     def setMachineExtruderCount(self, extruder_count):
-        extruder_manager = Application.getInstance().getExtruderManager()
-
-        definition_changes_container = self._global_container_stack.definitionChanges
-        if not self._global_container_stack or definition_changes_container == self._empty_container:
-            return
-
-        previous_extruder_count = self._global_container_stack.getProperty("machine_extruder_count", "value")
-        if extruder_count == previous_extruder_count:
-            return
-
-        # reset all extruder number settings whose value is no longer valid
-        for setting_instance in self._global_container_stack.userChanges.findInstances():
-            setting_key = setting_instance.definition.key
-            if not self._global_container_stack.getProperty(setting_key, "type") in ("extruder", "optional_extruder"):
-                continue
-
-            old_value = int(self._global_container_stack.userChanges.getProperty(setting_key, "value"))
-            if old_value >= extruder_count:
-                self._global_container_stack.userChanges.removeInstance(setting_key)
-                Logger.log("d", "Reset [%s] because its old value [%s] is no longer valid ", setting_key, old_value)
-
-        # Check to see if any objects are set to print with an extruder that will no longer exist
-        root_node = Application.getInstance().getController().getScene().getRoot()
-        for node in DepthFirstIterator(root_node):
-            if node.getMeshData():
-                extruder_nr = node.callDecoration("getActiveExtruderPosition")
-
-                if extruder_nr is not None and int(extruder_nr) > extruder_count - 1:
-                    node.callDecoration("setActiveExtruder", extruder_manager.getExtruderStack(extruder_count - 1).getId())
-
-        definition_changes_container.setProperty("machine_extruder_count", "value", extruder_count)
-
-        # Make sure one of the extruder stacks is active
-        extruder_manager.setActiveExtruderIndex(0)
-
-        # Move settable_per_extruder values out of the global container
-        # After CURA-4482 this should not be the case anymore, but we still want to support older project files.
-        global_user_container = self._global_container_stack.getTop()
-
-        if previous_extruder_count == 1:
-            extruder_stacks = ExtruderManager.getInstance().getActiveExtruderStacks()
-            global_user_container = self._global_container_stack.getTop()
-
-        for setting_instance in global_user_container.findInstances():
-            setting_key = setting_instance.definition.key
-            settable_per_extruder = self._global_container_stack.getProperty(setting_key, "settable_per_extruder")
-
-            if settable_per_extruder:
-                limit_to_extruder = int(self._global_container_stack.getProperty(setting_key, "limit_to_extruder"))
-                extruder_stack = extruder_stacks[max(0, limit_to_extruder)]
-                extruder_stack.getTop().setProperty(setting_key, "value", global_user_container.getProperty(setting_key, "value"))
-                global_user_container.removeInstance(setting_key)
-
-        self.forceUpdate()
+        # Note: this method was in this class before, but since it's quite generic and other plugins also need it
+        # it was moved to the machine manager instead. Now this method just calls the machine manager.
+        Application.getInstance().getMachineManager().setActiveMachineExtruderCount(extruder_count)
 
     @pyqtSlot()
     def forceUpdate(self):
diff --git a/plugins/MachineSettingsAction/MachineSettingsAction.qml b/plugins/MachineSettingsAction/MachineSettingsAction.qml
index b815d71acc..536c6c30d6 100644
--- a/plugins/MachineSettingsAction/MachineSettingsAction.qml
+++ b/plugins/MachineSettingsAction/MachineSettingsAction.qml
@@ -390,7 +390,7 @@ Cura.MachineAction
                             visible: Cura.MachineManager.hasMaterials
                             sourceComponent: numericTextFieldWithUnit
                             property string settingKey: "material_diameter"
-                            property string label: catalog.i18nc("@label", "Material diameter")
+                            property string label: catalog.i18nc("@label", "Compatible material diameter")
                             property string unit: catalog.i18nc("@label", "mm")
                             property string tooltip: catalog.i18nc("@tooltip", "The nominal diameter of filament supported by the printer. The exact diameter will be overridden by the material and/or the profile.")
                             function afterOnEditingFinished()
diff --git a/resources/qml/AskOpenAsProjectOrModelsDialog.qml b/resources/qml/AskOpenAsProjectOrModelsDialog.qml
index a53c711f9d..bd37d1acdb 100644
--- a/resources/qml/AskOpenAsProjectOrModelsDialog.qml
+++ b/resources/qml/AskOpenAsProjectOrModelsDialog.qml
@@ -26,33 +26,54 @@ UM.Dialog
     minimumHeight: maximumHeight
     minimumWidth: maximumWidth
 
-    modality: UM.Application.platform == "linux" ? Qt.NonModal : Qt.WindowModal;
+    modality: UM.Application.platform == "linux" ? Qt.NonModal : Qt.WindowModal
 
     property var fileUrl
 
-    function loadProjectFile(projectFile)
-    {
-        UM.WorkspaceFileHandler.readLocalFile(projectFile);
+    // load the entire project
+    function loadProjectFile() {
 
-        var meshName = backgroundItem.getMeshName(projectFile.toString());
-        backgroundItem.hasMesh(decodeURIComponent(meshName));
-    }
-
-    function loadModelFiles(fileUrls)
-    {
-        for (var i in fileUrls)
-        {
-            CuraApplication.readLocalFile(fileUrls[i]);
+        // update preference
+        if (rememberChoiceCheckBox.checked) {
+            UM.Preferences.setValue("cura/choice_on_open_project", "open_as_project")
         }
 
-        var meshName = backgroundItem.getMeshName(fileUrls[0].toString());
-        backgroundItem.hasMesh(decodeURIComponent(meshName));
+        UM.WorkspaceFileHandler.readLocalFile(base.fileUrl)
+        var meshName = backgroundItem.getMeshName(base.fileUrl.toString())
+        backgroundItem.hasMesh(decodeURIComponent(meshName))
+
+        base.hide()
     }
 
-    onVisibleChanged:
-    {
-        if (visible)
-        {
+    // load the project file as separated models
+    function loadModelFiles() {
+
+        // update preference
+        if (rememberChoiceCheckBox.checked) {
+            UM.Preferences.setValue("cura/choice_on_open_project", "open_as_model")
+        }
+
+        CuraApplication.readLocalFile(base.fileUrl)
+        var meshName = backgroundItem.getMeshName(base.fileUrl.toString())
+        backgroundItem.hasMesh(decodeURIComponent(meshName))
+
+        base.hide()
+    }
+
+    // override UM.Dialog accept
+    function accept () {
+        var openAsPreference = UM.Preferences.getValue("cura/choice_on_open_project")
+
+        // when hitting 'enter', we always open as project unless open_as_model was explicitly stored as preference
+        if (openAsPreference == "open_as_model") {
+            loadModelFiles()
+        } else {
+            loadProjectFile()
+        }
+    }
+
+    onVisibleChanged: {
+        if (visible) {
             var rememberMyChoice = UM.Preferences.getValue("cura/choice_on_open_project") != "always_ask";
             rememberChoiceCheckBox.checked = rememberMyChoice;
         }
@@ -90,47 +111,26 @@ UM.Dialog
         }
 
         // Buttons
-        Item
-        {
+        Item {
             id: buttonBar
             anchors.right: parent.right
             anchors.left: parent.left
             height: childrenRect.height
 
-            Button
-            {
+            Button {
                 id: openAsProjectButton
-                text: catalog.i18nc("@action:button", "Open as project");
+                text: catalog.i18nc("@action:button", "Open as project")
                 anchors.right: importModelsButton.left
                 anchors.rightMargin: UM.Theme.getSize("default_margin").width
                 isDefault: true
-                onClicked:
-                {
-                    // update preference
-                    if (rememberChoiceCheckBox.checked)
-                        UM.Preferences.setValue("cura/choice_on_open_project", "open_as_project");
-
-                    // load this file as project
-                    base.hide();
-                    loadProjectFile(base.fileUrl);
-                }
+                onClicked: loadProjectFile()
             }
 
-            Button
-            {
+            Button {
                 id: importModelsButton
-                text: catalog.i18nc("@action:button", "Import models");
+                text: catalog.i18nc("@action:button", "Import models")
                 anchors.right: parent.right
-                onClicked:
-                {
-                    // update preference
-                    if (rememberChoiceCheckBox.checked)
-                        UM.Preferences.setValue("cura/choice_on_open_project", "open_as_model");
-
-                    // load models from this project file
-                    base.hide();
-                    loadModelFiles([base.fileUrl]);
-                }
+                onClicked: loadModelFiles()
             }
         }
     }