So new problem here,
I have been using GSX since release without issues, today I just bought a scenery and added it to the jetways exclusion list, as usual.
When I launched the sim GSX was not present anymore, I tried to reinstalled but the fsdtinstaller says my drive is not formatted in NTFS, while it is and always have been. I also noticed it doesn't detect correctly my community path at the bottom, adding "\\?\" at the beginning.
I don't understand what happened, all was working fine yesterday, no Windows updates neither.