I’m bringing back this thread because I tried all of the above with no luck, but then discovered something very interesting. Not sure if this is a bug, or just the way RT works, but when you set it to not create sidecar files next to RAW files, and you rename the folder in which the RAW images are stored, RT will disassociate the folders from wherever it keeps its sidecar files! The folder name is tied to the sidecar files. Anyway, I renamed the folder back to what it used to be, and magic, everything is back as it was before.
If anyone has an issue like this, there’s your solution. Now I have to keep my folder structure identical to what I had it, otherwise I’ll lose the changes again 