This has been going on for a while. App settings are correct, but it's not working. Just tried a disc that's been out for quite a while (Hard Target - KL) and it would not rip. This has happened numerous times.
I have discovered a workaround. I can manually update AnyDVD HD by downloading the KeyDB and putting it in the AnyDVD folder, starting that program then closing it. MakeMKV then uses AnyDVD's decrypter and it works. That's not how it's supposed to work.
I suggest the devs put a setting in the app that allows "forcing" an update. Unless there is another suggestion. I'm listening.