I am flying the PMDG 737 NGX, and I am having a problem turning off crash detection.  I set it in the settings screen, but it resets when I start the flight.  I have tried to save the profile and load it from the flight screen to no effect.  What do I need to do to turn it off?

Have you turned it off in the FSX realism settings?

 

Once you do that, save a flight (preferably using the default Cessna), make it your default flight. Everytime you load FSX crash detection should be disabled.

I will try that, thanks.