Sometimes the software's local validation cache becomes corrupted. To fix this:
Scooter Software, the developers of Beyond Compare, generally revoke keys for a few specific reasons: beyond compare 4 license key has been revoked
If you are trying to use a version 4 key on version 5, check the Upgrade Center to see if you qualify for a free or discounted update. 4. Avoiding Future Revocations the developers of Beyond Compare
What do I do with a "Bad License Key" error? - Apryse documentation beyond compare 4 license key has been revoked