I've found the variable, but seems that it doesn't change anything if I change it. It only resets to that initial value between login and logout, nothing else. Any other hint?

I tried with Cheat Engine, but can't catch the FOV in a consistent way. I searched around and can't find anything that still work up to today version of ESO, except your Hook64, now vorpX doesn't want to hook ESO.exe(even if I excluded your program from the hook, inside vorpX). So I was wondering if...