I was going to try and reinstall everything tonight. I won't bother at this point. I'll keep an eye on that other thread as well. Thanks for the info.

I can add script hook v with the base game to get my add on and replacement cars to work, but no scripts beyond that. I play LSPDFR mostly and that works, but any mods for it (EUP, RDE) cause the game to crash on start up. I started a new mods folder from scratch yesterday and still can't figure it out. I think the last scripthook update is broken honestly...