I have used Nexus Mod Manager for about a year and I loved it. Despite my ability with computers Nexus Mod Manager made it much easier to install mods for my games. Eventually I got bored of Fallout 3 and Fallout: New Vegas and decided to take a break. Now I come back, and now this situation hasn't been ideal. Some Fallout mods that I install with the manager work just fine, but others come up with this "___ can't be added" blurb. I never got it before, previously when a mod didn't work I was at least able to install the mod and see if the game crashed or not, but now I can't even do that. What's wrong?