Playlists not shown or accessible under 7.9

I have LMS 7.9 on my QNAP TS469L NAS. Recently, due to some permissions and folder issues, I had to relocate my data from the original folder (call it x) to another folder (call it y). After relocating, I re-pointed LMS to look for music and playlists from x to y. After a rescan, all the music and favorites reappeared, but no playlists. I understand that the contents of the original playlists must be still referring to x, so I searched and replaced references in a couple of playlists (they are all located in y now) just to try. No sucess. I've also tried saving new playlists. The new ones said they have been saved, and I see them in the files (as for the rest of the playlists), but they don't show up under Playlists.

I will likely re-do the whole set-up on my QNAP for other reasons, but just in case that doesn't solve it, is there anything I should be looking at before hand?

Thanks.