Mods No Longer In Manager

[JaySwan]

This is my first post, so if I am posting the wrong place or am breaking some rule, apologies. Anyways, I am having a problem. I had Skyrim and Nexus Mod Manager with all my mods on my C drive, which is an ssd. After I stopped playing Skrim as often, I moved them both to my D drive to free up space on my ssd. NMM was being glitchy so i deleted it from C and redownloaded it to D. Now all of my mods are not in the manager anymore. The plugins are there, but I can't disable or enable any mods unless you can do that by unchecking plugins. Also, the mods are still working in my game. If anyone else has had this problem, it would be very helpful if you could tell me how you fixed it.