diff --git a/plugins/UM3NetworkPrinting/NetworkPrinterOutputDevice.py b/plugins/UM3NetworkPrinting/NetworkPrinterOutputDevice.py
index 58b62217f0..af2e1f8c00 100755
--- a/plugins/UM3NetworkPrinting/NetworkPrinterOutputDevice.py
+++ b/plugins/UM3NetworkPrinting/NetworkPrinterOutputDevice.py
@@ -527,12 +527,12 @@ class NetworkPrinterOutputDevice(PrinterOutputDevice):
         self._last_request_time = time()
 
     def _finalizePostReply(self):
-        if self._post_reply is None:
-            return
-
         # Indicate uploading was finished (so another file can be send)
         self._write_finished = True
 
+        if self._post_reply is None:
+            return
+
         try:
             try:
                 self._post_reply.uploadProgress.disconnect(self._onUploadProgress)
diff --git a/plugins/VersionUpgrade/VersionUpgrade25to26/VersionUpgrade25to26.py b/plugins/VersionUpgrade/VersionUpgrade25to26/VersionUpgrade25to26.py
index 2c598ad766..e1c14be2e1 100644
--- a/plugins/VersionUpgrade/VersionUpgrade25to26/VersionUpgrade25to26.py
+++ b/plugins/VersionUpgrade/VersionUpgrade25to26/VersionUpgrade25to26.py
@@ -127,7 +127,12 @@ class VersionUpgrade25to26(VersionUpgrade):
         machine_id = parser["general"]["id"]
         quality_container_id = parser["containers"]["2"]
         material_container_id = parser["containers"]["3"]
-        definition_container_id = parser["containers"]["6"]
+
+        # we don't have definition_changes container in 2.5
+        if "6" in parser["containers"]:
+            definition_container_id = parser["containers"]["6"]
+        else:
+            definition_container_id = parser["containers"]["5"]
 
         if definition_container_id == "custom" and not self._checkCustomFdmPrinterHasExtruderStack(machine_id):
             # go through all extruders and make sure that this custom FDM printer has 8 extruder stacks.
diff --git a/plugins/VersionUpgrade/VersionUpgrade27to30/VersionUpgrade27to30.py b/plugins/VersionUpgrade/VersionUpgrade27to30/VersionUpgrade27to30.py
index 3b1b854761..d0b78168b4 100644
--- a/plugins/VersionUpgrade/VersionUpgrade27to30/VersionUpgrade27to30.py
+++ b/plugins/VersionUpgrade/VersionUpgrade27to30/VersionUpgrade27to30.py
@@ -117,8 +117,25 @@ class VersionUpgrade27to30(VersionUpgrade):
         # Set the definition to "ultimaker2" for Ultimaker 2 quality changes
         if not parser.has_section("general"):
             parser.add_section("general")
-        if os.path.basename(filename).startswith("ultimaker2_"):
-            parser["general"]["definition"] = "ultimaker2"
+
+        # Need to exclude the following names:
+        # - ultimaker2_plus
+        # - ultimaker2_go
+        # - ultimaker2_extended
+        # - ultimaker2_extended_plus
+        exclude_prefix_list = ["ultimaker2_plus_",
+                               "ultimaker2_go_",
+                               "ultimaker2_extended_",
+                               "ultimaker2_extended_plus_"]
+        file_base_name = os.path.basename(filename)
+        if file_base_name.startswith("ultimaker2_"):
+            skip_this = False
+            for exclude_prefix in exclude_prefix_list:
+                if file_base_name.startswith(exclude_prefix):
+                    skip_this = True
+                    break
+            if not skip_this:
+                parser["general"]["definition"] = "ultimaker2"
 
         # Update version numbers
         parser["general"]["version"] = "2"