It is the nature of the beast that is the current incarnation of Pianobook. There is new site in the making and new forum on the way. I think they still streamline things when they get the chance but you have to live with it at the moment.
I replied to you query about DS, but don’t have a solution for you if you don’t keep older versions.
I thought uninstalling it and reinstalling it might lose the info but it didn’t make any difference in v1.0.