@la0michael0 the mod in the vault is based on the version we had in the FAF launcher (XtremWars 1.0 FAF featured). I just fixed some bugs and didn't touch any mod mechanics. There is a dev log file in the root of the mod with all the changes I made (Bugfix by Uveso.txt) you can download the mod also from here: https://forum.faforever.com/topic/364/updated-mods-for-faf-and-vanilla-steam (There is also a forum thread for every mod)

You could try to remove the mod manually from the mod folder, then reinstall again, via FAF client, maybe the permission issues in the first place did some funky stuff to the mod folder. Total mayhem itself should work AFAIK. If nothing works, you can remove all logs, recreate the problem and then post the latest logs - Thanks in advance.