May I suggest :
When you chose an album to visualise, you have to chose btw "diaporama" and "set of pictures". Then you chose let's say diaporama, and you change your mind, you can't reverse directly to the "set of pictures", you have to go back to the list of albums.
Just need a link to go from the diaporama to the set and one from the set to the diaporama.
Seems quite useful to me.
Thanks a lot for this plugin, it's marvellous !