I just deleted my entire library and redownloaded it.
A lot of my files were shitty 480p versions of movies from the Napster days. Now they're all 1080p, with a few 720p exceptions (mainly tv series episodes). All in all 500 something files in total. Now just watching uTorrent slowly download them all. Hopefully my VPN keeps the eyes off of me...
I had Radarr pointed to the "Movie" folder, then I changed it to the "Media" folder thinking that that would somehow be "better".
Whoosh It was all gone the next time I looked, because it couldn't find entries for whatever it came across, I guess. I ended up having to re-design the whole environment from pretty much scratch. The good news was that since I had "imported" my library initially, I had references to most of the stuff I lost.