Delete %appdata%\Scooter Software\Beyond Compare 4\BC4Key.txt .
Open Beyond Compare and go to Help > Enter Key to paste your legitimate license information. Legal and Free Alternatives
Ensure you are not accidentally using a leaked key. You can find your official key by logging into your account on the Scooter Software website or by requesting a replacement copy.
Instead of searching for "free" revoked keys, consider these options: Beyond Compare 4 license for Windows, Mac, Linux · GitHub
If you own a legitimate license and believe the revocation is an error, follow these steps:
Delete the key file typically located in ~/Library/Application Support/Beyond Compare/ .
Beyond Compare licenses are for specific major versions. A license key for Version 3 or Version 5 will not work for Version 4 .
When using , encountering a "license key has been revoked" message can be a significant disruption. This typically happens when a key is leaked publicly or if you are attempting to use a key for a different major version of the software. Common Causes for Revoked Licenses
Using "free" keys found on the internet often leads to revocation once the software performs a routine check. How to Fix a Revoked License Message