You can try to log in your Mac as administrator, trash DVDFab and its related documents. Open Finder->Applications to find DVDFab.app and move it to Trash, then go to Finder->Documents, delete the whole "DVDFab" folder, reboot your Mac to delete some temporary files that may be left over.
Then reinstall DVDFab for Mac 9.2.1.8 to see the result.
DVDFab log default location: For Windows: C:\Users\User Name\Documents\DVDFab10\Log For Mac: Finder> Documents> DVDFab10> Log
DVDFab Player 5: For Windows:C:\Users\User Name\Documents\DVDFab Player 5\Log
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