I do not understand how you can tell me this is not something with GSX when the FSX screen freezes but the sounds still play in the back ground. How can it not be GSX?
I already explained it to you many times, the problem is that you don't want to accept the explanation. You are AGAIN confusing the symptom with the cause. Fact it's happening after you use GSX, doesn't mean the CAUSE is GSX, it's just that your problem, caused by something else, cannot be discovered because nothing else in your sim is doing anything to trigger it, but that doesn't mean GSX is doing anything "wrong".
Since you don't seem to understand, I'll make you a list of situations that CAN crash your sim, being a fault of OTHER stuff, and will appear ONLY if you select GSX, misleading you "it's GSX":
1) You might have a bug in your audio drivers that don't properly support OpenAL, which is a standard library used by hundreds of games which GSX also uses. Since an audio driver CAN crash FSX, if you have this issue, you will notice a crash the moment you start GSX, because the created vehicles will start playing sounds, and a bugged audio driver might crash, misleading you "it's GSX, because it happened when I selected it"
2) You might have a bug in your video drivers that don't properly support some totally standard features used by GSX (and not many others addons), like vertex skinned animations. Since a video driver CAN crash FSX, if you have this issue, you will notice a crash the moment you start GSX, because the created vehicles will start using these animations, and a bugged video driver might crash, misleading you "it's GSX, because it happened when I selected it"
3) If it happens after a flight, a MEMORY-HUNGRY airplane you are probably using might have a memory leak that requires some time to eat up all your VAS so, after you land and then you call GSX, the additional memory requirement caused by asking for new vehicles + their textures + their sounds, has caused the sim to OOM. Since the Windows memory allocator CAN crash FSX, if you have this issue, you will notice a crash the moment you start GSX, because the created vehicles will use some memory so, if you already were CLOSE to memory exhaustions because of the memory-hungry airplane you are using, the sim will crash, misleading you "it's GSX, because it happened when I selected it"
That's just a very short list of the most obvious things.
Since in our Teamviewer session you weren't able to show me ANY GSX crash when just GSX was running, and from your report it seems to happen after a flight, I'd say you are likely in case #3.
If you can show me a reproducible case of FSX crashing as soon GSX is selected, with no other addons running and with a default plane on a default airport, at the beginning of a flight, I'd be totally interested in another Teamviewer session to see if first hand.