Include the version in the cached definitions path

This ensures we do not try to load old cache files when a newer version
is used, or the other way around.

Fixes CURA-2832

UM/Application.py

@@ -105,6 +105,8 @@ def __init__(self, name, version, buildtype = "", **kwargs):
 
         self._plugin_registry.setApplication(self)
 
+        UM.Settings.ContainerRegistry.setApplication(self)
+
         self._parsed_command_line = None
         self.parseCommandLine()
 

UM/Settings/ContainerRegistry.py

@@ -454,7 +454,7 @@ def _deleteFiles(self, container):
     # Load a binary cached version of a DefinitionContainer
     def _loadCachedDefinition(self, definition_id, path):
         try:
-            cache_path = Resources.getPath(Resources.Cache, "definitions", definition_id)
+            cache_path = Resources.getPath(Resources.Cache, "definitions", self.getApplication().getVersion(), definition_id)
 
             cache_mtime = os.path.getmtime(cache_path)
             definition_mtime = os.path.getmtime(path)
@@ -483,7 +483,7 @@ def _loadCachedDefinition(self, definition_id, path):
 
     # Store a cached version of a DefinitionContainer
     def _saveCachedDefinition(self, definition):
-        cache_path = Resources.getStoragePath(Resources.Cache, "definitions", definition.id)
+        cache_path = Resources.getStoragePath(Resources.Cache, "definitions", self.getApplication().getVersion(), definition.id)
 
         # Ensure the cache path exists
         os.makedirs(os.path.dirname(cache_path), exist_ok=True)
@@ -499,6 +499,15 @@ def getInstance(cls):
             ContainerRegistry.__instance = cls()
         return ContainerRegistry.__instance
 
+    @classmethod
+    def setApplication(cls, application):
+        cls.__application = application
+
+    @classmethod
+    def getApplication(cls):
+        return cls.__application
+
+    __application = None
     __instance = None
 
     __container_types = {