If you’ve emptied your Community folder already, that’s fair enough.
But there is a way to force Safe Mode.
Use that code to create a file called “running.lock” in that location, and it will force the sim to ask you if you want to launch in safe mode or not. Copied below for convenience.
https://forums.flightsimulator.com/t/command-line-parameter-to-start-the-sim-in-safe-mode/535418/9
copy nul > %LOCALAPPDATA%\Packages\Microsoft.FlightSimulator_8wekyb3d8bbwe\LocalState\running.lock
Assuming it can get that far of course.