GSX always was good until last update. What can i check?
Maybe you are confusing the latest Live Update, which only updates the GSX code, with the latest Addon Manager update ? This fix requires the latter and, as I've said in one of the posts in this thread, requires installing anything from FSDT:
The updated Addon Manager .DLL files are online now, so everybody installing anything from FSDT (GSX, a scenery, the Stand-Alone Addon Manager) will get the update.
The "Check for updates" feature cannot be used here, since it's not possible to update the program executables while sim is running.