Lost Tamper Protection Password - new UTM in place. How to uninstall Endpoint Protection?

Hi,

my former UTM installation was not working stable after about 1,5 years. So I got replaced it. (I still possess the encrypted config backup files, though).

One of my Windows PCs was secured using "Sophos Endpoint Security and Control", TamperProtection activated. No I can't uninstall it.

I already have tried to set the registry keys according to this article: https://community.sophos.com/kb/en-us/124377

What else could I do to have it removed?

The only thing I could think of would be to install the UTM image as a VM, restore the config, and remove the tamper protection. Would that work? Or are those passwords/settings not in the backup file?

All the best,

Thomas