I’m generally very happy with PP, and I only have a few feature requests - here is number one!
I really miss the ability to create more top-level containers like ALL PAPERS (and name them appropriately).
The reason for this, is that I work in several fields namely as a historian, a biologist, a geographer and as a high school teacher, and it would be very nice and structurally preferable to be able to separate my materials completely on a higher level than ‘folders’.
‘Add papers’ should then be to that top-level folder that are active and/or chosen as default. And you should be able to move a material from one to the other.