Crash Detection Settings resetting FS Passengers & Air Hauler

Hi was wondering if any one else has come across this.  I mainly fly now with either FSPassengers or Air Hauler and have set crash detection  to off to allow these programs to inject failures etc

However every now and again in fsx settings it seems to reset itself to "detect damage and crashes".  Anyone know if there is anything I can add to the fsx .cfg file to stop this happening? 

Not a major issue, just a little bit  annoying

Cheers

Steve