I have fixed the last element of my query re playlists. I moved the iTunes music file back to the location as iTunes is storing its playlists (D:My DocumentsMy MusiciTunes) and pointed Firefly back to this same location. In this way I avoided declaring a further Music Folder to Firefly, which seemed to be causing an “error on page” for some reason.
Firefly has now picked up all iTunes playlists.
Thanks again for your help.