Probably your steam cloud save data got corrupted.
Turn off steam cloud for msfs.
edit
https://forums.flightsimulator.com/t/steam-ctd-on-startup-after-splash-screen/356188/11
Probably your steam cloud save data got corrupted.
Turn off steam cloud for msfs.
edit
https://forums.flightsimulator.com/t/steam-ctd-on-startup-after-splash-screen/356188/11