diff --git a/cura/CuraApplication.py b/cura/CuraApplication.py
index 5b2cf49db2..1b41cdda2f 100644
--- a/cura/CuraApplication.py
+++ b/cura/CuraApplication.py
@@ -78,6 +78,8 @@ class CuraApplication(QtApplication):
         if not hasattr(sys, "frozen"):
             Resources.addSearchPath(os.path.join(os.path.abspath(os.path.dirname(__file__)), ".."))
 
+        self._open_file_queue = [] #Files to open when plug-ins are loaded.
+
         super().__init__(name = "cura", version = CuraVersion)
 
         self.setWindowIcon(QIcon(Resources.getPath(Resources.Images, "cura-icon.png")))
@@ -148,6 +150,8 @@ class CuraApplication(QtApplication):
         if self.getBackend() == None:
             raise RuntimeError("Could not load the backend plugin!")
 
+        self._plugins_loaded = True
+
     def addCommandLineOptions(self, parser):
         super().addCommandLineOptions(parser)
         parser.add_argument("file", nargs="*", help="Files to load after starting the application.")
@@ -205,13 +209,18 @@ class CuraApplication(QtApplication):
 
             for file in self.getCommandLineOption("file", []):
                 self._openFile(file)
+            for file_name in self._open_file_queue: #Open all the files that were queued up while plug-ins were loading.
+                self._openFile(file_name)
 
             self.exec_()
 
     #   Handle Qt events
     def event(self, event):
         if event.type() == QEvent.FileOpen:
-            self._openFile(event.file())
+            if self._plugins_loaded:
+                self._openFile(event.file())
+            else:
+                self._open_file_queue.append(event.file())
 
         return super().event(event)
 
diff --git a/resources/machines/fdmprinter.json b/resources/machines/fdmprinter.json
index 20ec26f223..ca21e83a97 100644
--- a/resources/machines/fdmprinter.json
+++ b/resources/machines/fdmprinter.json
@@ -1305,7 +1305,7 @@
                     "description": "Experimental feature: Make support areas smaller at the bottom than at the overhang.",
                     "type": "boolean",
                     "default": false,
-                    "visible": false,
+                    "visible": true,
                     "enabled": "support_enable"
                 },
                 "support_conical_angle": {
diff --git a/resources/machines/ultimaker2plus.json b/resources/machines/ultimaker2plus.json
index f11cbe46d7..7e158b8a84 100644
--- a/resources/machines/ultimaker2plus.json
+++ b/resources/machines/ultimaker2plus.json
@@ -15,6 +15,27 @@
         "machine_depth": { "default": 225 },
         "machine_height": { "default": 200 },
         "machine_show_variants": { "default": true },
-        "gantry_height": { "default": 50 }
+        "gantry_height": { "default": 50 },
+        "machine_head_with_fans_polygon":
+        {
+            "default": [
+                [
+                    -44,
+                    14
+                ],
+                [
+                    -44,
+                    -34
+                ],
+                [
+                    64,
+                    14
+                ],
+                [
+                    64,
+                    -34
+                ]
+            ]
+        }
     }
 }