How to troubleshoot MSFS freezing up

Hi, I use the FlyByWire A32NX and I did a flight from London Gatwick to Corfu, around two hours into the flight my game froze and noped out (this crash happened completely unexpectedly with no warning) I wonder if it was any of these reasons:

.I used the replay tool (settings, general, experimental, replay tool) and was recording at that moment.

.I pressed left click and ‘s’ at the same time right before the crash, I sound stupid but does that key-combonation crash the game or something?

.I used the London Gatwick 2024 addon from flightsim.to by mkvy, I noticed when it was installed, loading times increased dramatically and the game got way laggier.

I would like a fix that doesnt involve turning off replay tool and deleting the Gatwick addon but if i have to then i will get rid of them.

Then, I tried another flight from London Heathrow to Paris CDG and the game froze right after takeoff, I could still hear sound but the game wasnt working (like what many people have talked about). I don’t have any sort of air-traffic enabled for both of those flights

Any help please?