since my last flight (before yesterday) when I want to do appraitre the GSX menu that does not work, yet when the park brake is not activated it asks me to activate but after nothing ... What to do please?
Do you use Prepar3D 3.2 ?
If yes, this has ben discussed many times on the forum. It's not something that has anything to do with GSX.
Every 3rd party application with a menu will not display the menu if you upgraded P3D using only the Client installer, which is missing support for the updated in-game menus.
Either install the P3D "Content", or use the "Full" installer.