Thanks for the feedback, @Thomas_Girke! A more comprehensive help center is in the works; we do plan to include tutorials and other didactic material so this topic will definitely make it there. There already is a guide to convert citations from EndNote to Paperpile format in Word, perhaps you’ve come across it?
In the meantime, we made two straightforward recordings of the conversion process for you – one for each direction.
Hope this is helpful for you and the team. I don’t have a concrete timeline to share for the new help center but there should be some news by summer. Pease don’t hesitate to reach out again here or via chat/email (support@paperpile.com).