Back to the major.minor version for config files. Ref https://github.com/GNS3/gns3-gui/issues/2756

gns3server/controller/__init__.py

@@ -128,7 +128,7 @@ class Controller:
             except (ComputeError, aiohttp.web.HTTPError, OSError):
                 pass
         await self.gns3vm.exit_vm()
-        self.save()
+        #self.save()
         self._computes = {}
         self._projects = {}