Aha, maybe I've found the answer, but just to be sure.......
I'm familiar with ADE for FSX/P3D but, I've just started with ADE for MSFS 2020. When I load the stock airport I want to edit, no default scenery objects are visible, even though there are plenty visible in MS2020 when I go to view the airport.
I want to delete a default building so that I can replace it. Although it's visible in MSFS, it's not visible in ADE 2020, so there's nothing to delete. An exclusion rectangle doesn't delete it either. I can add a default library object to the airport with no problem and view it in MSFS.
Am I stuck with this default building, or have I missed something please and I can in fact delete it?
I'm using Alpha 21 with Hotfix 5.
Many thanks,
John