I have tried it. Uninstall and then new install with the newest update. But still nothing.
I can only repeat and confirm that, if you have the latest GSX and the latest vehicle update installer (just the LATEST one, you don't need the old ones), the problem will not happen.
You must have not downloaded the correct files (as I've said, install ONLY the CURRENT GSX full installer and only the LATEST vehicle updates, not all 3), or you are not installing what you just downloaded.
Of course, if you tried to "fix" this by editing the plane, it's also possible you might have done some kind of mistake while doing it. The "Reset" button in the airplane configuration dialog will revert the plane to the default configuration that comes with GSX, assuming the plane you use is already supported by GSX, otherwise you'll have to configure it again.