In my experience, it sounds like an error I run into sometimes. I also use script mods, and yes, sometimes after an update (or arbitrarily) I'll launch my game and find some or all of my game packs that I've purchased disabled as though I do not own them. Simply closing and reopening the game again fixes this for me.
In order to tell if it's the same issue:
- On your Main Menu, click Load Game (not Resume)
- Look at the save file you've been playing most recently. Does it show a list of game packs beneath it? If so, it's the same issue. If not, I'm not sure what's going on. Sorry!