Yes that would be the simple answer, however the folders already have the album cover inside as .jpg. See below with album by B12 selected.
Screenshot 2020-06-09 at 19.52.12.jpg
Perhaps spoon could chip in? or maybe I just forget the WAV versions and download a FLAC. Would be good to get to the bottom of this though as I have been happily using DBpoweramp for many years.
Thanks again Gary