diff --git a/cura/CuraApplication.py b/cura/CuraApplication.py
index 7e2f0fb1ca..28dfd5e1c9 100755
--- a/cura/CuraApplication.py
+++ b/cura/CuraApplication.py
@@ -179,7 +179,7 @@ class CuraApplication(QtApplication):
         self._use_single_instance = False
 
         self._single_instance = None
-        self._project_mode = None
+        self._open_project_mode: Optional[str] = None
 
         self._cura_formula_functions = None  # type: Optional[CuraFormulaFunctions]
 
@@ -1846,7 +1846,7 @@ class CuraApplication(QtApplication):
         Logger.log("i", "Attempting to read file %s", file.toString())
         if not file.isValid():
             return
-        self._project_mode = project_mode
+        self._open_project_mode = project_mode
         scene = self.getController().getScene()
 
         for node in DepthFirstIterator(scene.getRoot()):
@@ -1856,16 +1856,16 @@ class CuraApplication(QtApplication):
 
         is_project_file = self.checkIsValidProjectFile(file)
 
-        if self._project_mode is None:
-            self._project_mode = self.getPreferences().getValue("cura/choice_on_open_project")
+        if self._open_project_mode is None:
+            self._open_project_mode = self.getPreferences().getValue("cura/choice_on_open_project")
 
-        if is_project_file and self._project_mode == "open_as_project":
+        if is_project_file and self._open_project_mode == "open_as_project":
             # open as project immediately without presenting a dialog
             workspace_handler = self.getWorkspaceFileHandler()
             workspace_handler.readLocalFile(file, add_to_recent_files_hint = add_to_recent_files)
             return
 
-        if is_project_file and self._project_mode == "always_ask":
+        if is_project_file and self._open_project_mode == "always_ask":
             # present a dialog asking to open as project or import models
             self.callLater(self.openProjectFile.emit, file, add_to_recent_files)
             return
@@ -2001,9 +2001,9 @@ class CuraApplication(QtApplication):
 
                     node.translate(Vector(0, center_y, 0))
                     nodes_to_arrange.append(node)
-            # If file extention is 3mf and models are to be loaded from a cura project,
-            # models are to be arranged in buildplate.
-            elif self._project_mode == "open_as_model":
+            # If the file is a project,and models are to be loaded from a that project,
+            # models inside file should be arranged in buildplate.
+            elif self._open_project_mode == "open_as_model":
                 nodes_to_arrange.append(node)
 
             # This node is deep copied from some other node which already has a BuildPlateDecorator, but the deepcopy