Hi, all I'm kind of new to modding (well, to doing the modding myself, not to using mods), and I started using TES5Edit a couple weeks ago. Everything was working great up until yesterday when I tried to run the program to edit some NPCs, and it gave me a really strange error. I've googled the error, and I can't seem to find anyone else who's had the same issue as me. The error: [00:00] Background Loader: Fatal: <Exception: C:\Program Files (x86)\Steam\steamapps\common\Skyrim\Data\Update.esm is not a valid BSA file> I've tried uninstalling and reinstalling TES5Edit. I've tried redownloading it and reinstalling. I've tried verifying the integrity of my Skyrim files. I've tried deleting the Update.esm and Update.bsa files and letting Steam reinstall them. Turned it off, turned it on again. I just really don't understand what's going on. It seems to me it's trying to use Update.esm in place of Update.bsa but I can't figure out how to stop it from doing that or why it happened in the first place. Any help would be greatly appreciated as I'm getting pretty frustrated here.