I am trying to roll back my currently installed proprietary NVidia driver (v535) to an older version because I suspect the latest update causes problems with many Windows games played through Proton on Steam.
The driver manager in KDE does not seem to allow me to select another driver like I could in previous releases of Ubuntu Studio - the button to "Apply changes" is greyed out:
All the questions I find here either relate to installing the latest driver, repairing a broken install, or are simply outdated.
What is the correct procedure to follow to safely install an arbitrary Nvidia driver version on Ubuntu Studio 22.04?