Another final fix will follow soon.
If anyone has problems since the Halloween update, please follow these steps:
1. Open the Steam Library
2. Steam library on "Software"
3. Right click on "CUR3D Maker Edition"
4. Open "Properties"
5. Select "Local Files" tab
6. Click on "Check files for errors"
Then a download starts and the wrong file is exchanged. Now the problem should be fixed. As mentioned above, we still publish a final fix that replaces the workaround.