So, I'd say what is happening is that Mike found out what single-user licenses are being "rented" to you by PavTube and the others, and revoked them. Easy enough to do - get someone to do a registry dump from a system with the abused license and send it in, and extract the key from it.Stolen copies of MakeMKV
MakeMKV is certainly one of the best software for Blu-ray to MKV conversion. Being successful means that many companies are trying to copy our success, and some of them do that literally.
Lately, several companies began selling MakeMKV as their own - they buy a single copy of MakeMKV, repackage it, add a nicely-looking interface and then sell as their own product. Most of the companies and products come form China - examples are Leavo, Pavtube, Acrok, etc.
You see this page because a copy of MakeMKV software is running on your computer, and it detected that it is "abused" by another software. If you were running a version of some "NoName Ultimate Video Converter" and got this message - then you are in fact running a stolen copy of MakeMKV. We can detect such usage, and we can disable MakeMKV functionality for stolen copies.
The purpose of this page is to inform you about the fact, that you are using (and possibly have paid) for the stolen software. The choice what to do next is yours.
In which case, buying your own license to MakeMKV would probably allow the PavTube "wrapper" to function again, but there are no guarantees of that. I wonder if putting the beta key in would work? Starting MakeMKV, Help->Register, and put the current beta key in, so it overwrites the PavTube key...
Long story short - if you paid money to PavTube, you got ripped off by PavTube.
I wouldn't be surprised if you found a copy of handbrake installed on your machine, too; although it is simple enough to put a wrapper around ffmpeg to do what PavTube is doing, too.