Ok. It wasn’t so simple to create projects 2 years ago. ADE makes the project creation process super simple for me… I don’t have to worry about creating assets, etc…
Granted, I only use ADE to create the project, all the rest I do in the Scenery Editor in MSFS. I hope you weren’t trying to edit the airport in ADE? I can’t do that without actually working in the sim.
You have to be editing the airport itself though, or the taxiways / parking spots won’t link up… ?
It is possible, however to create a new scenery bgl, however that’s not linked to the airport, but rather sits on top of it. To cut / grow trees, add / remove objects, etc.
(Not to mention I haven’t found a runway or airport yet that’s as correct as I want it to be… (location, length, orientation, frequencies, etc.))