I just spent all night downloading and installing the latest versions from every USA airport from flightsim.to and the sim loads and I can start a flight under SU7. I have many Canadian airports and others installed, as well. Usually if you have bad scenery you will get a CTD and it wont load, so Im keeping my hopes up that nothing was affected by SU7 as far as the airports themselves. I also own 20 payware airports that seem to be working fine.
What is your loading time like?