Sir ... You are not understand me ...
I understood you pretty well.
I never make a changed before today on this setting[/u]
You did, and you forgot about it. You might have done it months ago. As I've said, the installer wouldn't change something that you change as a preference.
... But after CYVR and last update GSX, If I stay by default installer, all on CTRL shift F12, ... that's not get display GSX menu in my FSX !
The installer, if you NEVER change settings, installs YouControl as CTRL+F12 and GSX as CTRL+Shift+F12. This ONLY if you never used GSX and never changed its settings. But if you DID, the installer will NOT touch your personal settings.
I tell you what you did: you probably changed the previous GSX setting to CTRL+Shift+F12 instead of CTRL+F12, to fix the conflict with the IVAP program, which also use the same key, and you forgot about this.
Installing the new version ADDED a new keystroke, which by chance is CTRL+Shift+F12 but, since the installer doesn't change your settings, you ended up having the two keys being the same, which is why it didn't worked.