I deleted bitfield_ms_vopt_38.xml from my xml folder and reinstalled the old version. My usergroups are still messed up. No matter what edits I make to them, it just creates a new custom group that I also can't edit. I've checked on my forum that does not have this hack installed at all and there is no problem over there so I know it's not vb 3.8.1 that caused this problem. I also disabled the only other hack I upgraded today (
https://vborg.vbsupport.ru/showthread.php?t=199975) and I'm still having the problem. Even when I disable the old version of this hack, I have this problem. This is a pretty big deal and I need a fix for this!