Preview tool is missing

If you see the “Video preview tool not found. You can check in Settings.” notification, press the Settings button and follow the explanation shown.

If it says “Merceq’s video tool is missing. Reinstall Merceq.”, reinstall the app from the official download page. If possible, back up your library first; don’t manually delete Merceq’s data folders or video archive. After reinstalling, check the preview again.