I know I'm reviving a long-dead thread, but people will obviously continue to have this problem (as have I just under an hour ago) and I have something worthwhile to contribute. As DropaDred said, Shattywack's fix (renaming the program's folder to simply 'NMM') works, but also renders the program incapable of receiving .nxm links from the 'Download with Manager' button on mod pages. I have a solution however (for Windows 7 at least, probably works for other Windows OS' aswell). Firstly, open Regedit on your PC. To find it if you don't know how, simply search for it in the Start Menu. Then one after the other, navigate to the following subkeys and delete them (along with everything in them, of course):
HKEY_CLASSES_ROOT\.nxm
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.nxmNext, close Regedit and open Task Manager (press Ctrl+Alt+Del and choose 'Task Manager', for those who don't know). Go to the Processes tab, find 'explorer.exe', click it and then click 'End Process'. Windows will disappear, but fear not! Go back to the Applications tab in Task Manager, click 'New task...' and type the following and press the enter key:
C:\Windows\explorer.exeWindows should return. Now, completely uninstall Nexus Mod Manager, including its configuration files - do not just reinstall NMM over the top of your current installation, it won't work. You won't lose your mods! Going through uninstalling would add some unnecessary steps to this post, so I will omit that - it's easy though, and if you don't know how you can easily Google it. If you renamed your installation folder to 'NMM', you will need to delete that folder in addition to uninstalling Nexus Mod Manager. This is because any method of uninstallation will attempt to remove the location you originally installed it to, which would be 'Nexus Mod Manager' for most. It will clean up a lot of files that need to be gotten rid of from around the system, but it will leave the 'NMM' folder, which it will not know is where the program is now. Once you've uninstalled Nexus Mod Manager, install it once more. This time around, install it to 'C:\Program Files\NMM' or another directory that suits you, but do not install it to the same directory it was originally installed to. Also, make sure that 'Associate NXM: URLs with Nexus Mod Manager' is ticked in the list of options (I recommend you tick everything except the one that mentions the shell extensions. You will need to log in again and put your preferred settings in again, but Nexus Mod Manager should now function as new, with your mods still there! So that's it, hope I helped :smile: A note to moderators who may be reading this post: I ask that this be put somewhere where anyone can easily see it, rather than letting it be buried with the thread as more threads pile above it. I have had numerous problems with NMM that threads of my own about have not received answers for and that I have had to dig deep to find a solution; it's painful, and I'm sure a lot of unfortunate users with unusual problems like this don't have the will to dig as deep as they may need to in order to find this information. Of course, this is at your discretion, I simply ask it of you.