I'm having this same problem. Set read only on plugins.txt, the game nukes it and replaces it with a non read only version every time I launch the game. I've tried the launcher trick that was mentioned earlier as well, that didn't work either. I've gone so far to keep a backup of my plugins.txt on my desktop, so I can simply drop it into the folder, but for whatever reason after Automatron dropped, the game resets the file every time. Didn't have this issue 3 days ago. Can't figure out why it's happening either. For what it's worth, I was still using version 0.61.9 when this started happening, I updated it to version .14 and am still having the same problem. I don't think NMM is to blame here. edit: grammar