ResidentAlien

Thanks for your help, since I had a copy of the Saves folder, I decided to wipe the whole thing and reinstall it one last time. This time, it appears to work. I have the workshop menu again, not yet proceeded to build anything but it all looks fine. I have absolutely no idea why the same install failed before and will put it down to gremlins for want of a better explanation. If it was a file corruption that survived two previous reinstalls, it will never be known and doesn't seem to make sense but there you go. All is well. I will proceed with mods cautiously and with backups of the vanilla files where I can, a little older and wiser. You're correct, there are six robot files. I never was good at math. Thanks again, I hope the information you gave me will be useful for others, too.

Outstanding info and response speed! Thanks a lot for that, I hadn't found a complete file list anywhere and that saves a great deal of time trying to troubleshoot. I do have a vanilla install, as I thought. There are some differences from your list which are related to the DLC: the appdata folder contains a DLCList.txt file and the DLC is not listed in the plugins.txt; and the games/data folder includes three DLCRobot files in addition to the ones you list. I doubt any of this is relevant and only mention them here for completeness. I still have the CTD at the workshop bench and none of the others, and need to explore further, as you suggest. That information should be pinned somewhere if it's not already. Thanks again.

I'm a bit late to this thread I know, but I've tried everything I can think of and continue to have a CTD when attempting to access the workshop after: Uninstalling all Fallout 4 files, twice, including the appdata and my games folders left behind by an uninstall; Removing all traces of Fallout 4 from the Windows registry; Removing all mods and related folders that were previously created by NMM; Uninstalling NMM and not reinstalling it again; Starting over with a clean install of Fallout 4, twice; downloading someone else's clean save game and not replacing any of mine. I have no mods, no NMM files or folders, no trace of old Fallout 4 installs that I can see anywhere, all .ini and prefs files were located and deleted at least once, probably twice and allowed to re-create themselves. I have no new textures folder, no workshop related files that I can see and nothing that would have created them. Everything I can see is vanilla. Prior to the last install, a Windows search returned no files for the keyword "fallout". As soon as I hit E or V for the workshop I get a CTD. This began as an issue with mods installed by NMM, but these are all long gone now as is NMM itself. I have run out of things to delete and reinstall and I'm sorry to have to ask for help but I honestly can't think of anything I've overlooked. I have an entirely clean install, but there must be something I've missed. I just can't think where to look. Thanks in advance, if you can see what I missed and save what's left of my hair.