Keydbcfg Makemkv ((better)) -

: You can write a brief PowerShell script or download a community-made .bat script that uses Invoke-WebRequest to fetch the latest file from a GitHub mirror and drop it into your %USERPROFILE%\.MakeMKV\ directory.

Sometimes, specific regional releases or special editions have unique volume keys not present in standard databases. How to Set Up and Use KEYDB.cfg in MakeMKV keydbcfg makemkv