The popup functionality works a little different than before and we are working on creating a support article that will be public soon. But the way it works is If an object is placed on any of the popup layers, i.e "Bp - Popup - main content", "Bp - Popup - pinned blocks" or "Ap - Popup - Main Tower", the popup panel will become active. Then you can then use the popup panel to assign popup attributes to the object.
I see that you have put a support ticket in as well. I will reply to you there to request an InDesign file.
Mag+ Support Team