You’re very welcome - happy to help mate.
I’m also glad I asked about the PC Gaming Preview - looks like that was the key, since it’s exactly what’s forcing Gaming Services to update to version 30.103.10001.0.
I was actually quite sure about it because I helped someone with exactly the same problem just yesterday.
https://forums.flightsimulator.com/t/msfs24-no-longer-starting/729926/37?u=tenpatrol
Good thing the questions and tips helped point things in the right direction.
Looking back, I probably should’ve asked you to double-check in the Xbox Insider Hub app - or even send a few screenshots - just to confirm whether you were part of the PC Gaming Preview.
I took your word for it and that was my mistake 
Kinda funny, though I always tell myself: “Never fully trust the person you’re helping - they might’ve just forgotten something!”
PS. I’m not sure if you remember - just yesterday in another thread I asked you if you had some time for testing
if you had, we could have solved this problem right then and there, because I would’ve shown you exactly what to do, as I wrote above.
Fly safe.