This is a straight up install— no add-on mods, no changes to the app since install. All hardware appears to be working so perhaps it is a loading issue with something. This has the 1.51 Citation mod that was needed to get the aircraft performing properly. 64 Gig ram, GTX 3090, clocked at 4.2. Has been running app smooth on high settings. This is a full Longitude sim that has been working? I will try removing files under community folder. Puzzling