Tried the new driver and had CTD within 30 minutes. Granted, this issue happens only with MSFS but going back to 20.10.1 seems to resolve the below crash event:
Faulting application name: FlightSimulator.exe, version: 1.15.10.0, time stamp: 0x00000000
Faulting module name: VCRUNTIME140.dll, version: 14.28.29334.0, time stamp: 0x5fa9a822
Exception code: 0xc0000005
Fault offset: 0x00000000000012de
Faulting process id: 0x4ce0
Faulting application start time: 0x01d744f909f4b2bc
Faulting application path: C:\Program Files (x86)\Steam\steamapps\common\MicrosoftFlightSimulator\FlightSimulator.exe
Faulting module path: C:\Windows\SYSTEM32\VCRUNTIME140.dll