Exactly the same problem here. I just updated to version 1.8 from 1.4 (I think), via Nexus Mod Manager by deactivating the old mod, installing the new, then deleting the old. I then sorted the load order using LOOT. Any ideas anyone? Edit - oh yes, I only selected 'NPC usable' structures, whereas before I had bunkers, etc. I didn't like the fact no one used the buildings!