Files causing SongKong to exit after LoadFiles with UnexpectedError happens for both FixSongs and StatusReport but nothing in logs. Weirdly moving the files out of folder allowed it to work, but could also run on just problem files folder and Status Report continue work as well (but forgot to check FixSongs)
Note all files were in folder without any subfolders, but folder was not root folder.
From clicking on properties of parent folder it appeared that some files were read only
Waiting for problem files.