GSX cannot crash the sim, this is beyond any doubt. It simply can't.
However, the sim can crash for other reasons that might be indirectly related to GSX, for example when GSX legitimately ask for the Navdata to present a list of airports around you when you open the GSX menu in flight, a problem with the Navdata CAN crash the sim, and you can easily mislead GSX was the "cause" (because it didn't crash with GSX disabled), when the real cause was a problem with Navdata, and we got many cases where even something as trivial as a duplicate entry, either with just the default Navdata and/or when using Navigraph, could cause a crash in the sim.
To prevent this, you have two options in GSX:
- Don't fly with the GSX menu Active (light icon). We close it when you take off, but we can't prevent you from opening it in flight. If you need to open it in flight, close it entirely (dark icon) after you are done with it.
- Use the "Disable in Cruise" option in GSX.
These two combined will prevent GSX from requesting any Navdata while flying, so the chance of a crash in flight caused by bad Navdata should be much lower.