I have been modifying an airport with ADE alpha 19 (no two-way editing) for a few weeks. Yesterday, I started MSFS to view some recent changes and was presented with update 184.108.40.206 after which MSFS started as if I never used it before asking for acknowledgement of controllers connected and ease of use settings. When I finally got to loading a flight from the world map, the loading screen never went away and the flight didn't start. If I let it go long enough, the attached error message was displayed. I assumed that the update messed things up until I found that flights from other airports, including those modified by ADE, loaded fine. After restarting the computer and making a project backup, I started deleting things added to the airport (can't restore those deleted) since last successfully viewing it in MSFS. None of this was successful except building from a backup made shortly after starting the project. Any idea on what went wrong?