After I try to reinstall again this problem was fixed however it addon manager does not display on FSX menu
That's likely because you, seeing that it seemed to crash FSX (it didn't, but it looked like that), haven't authorized the program to run. To Undo that, try this:
- Uninstall GSX and reply YES to the question "Do you remove the Addon Manager?" AND reply YES to the question "Do you remove the Couatl scripting engine?" that will be made by the Uninstaller.
- Check if you also have inadvertently Un-trusted us as a Publisher (even a while ago), so nothing signed by us will run. This can't happen automatically, only you can do this. To fix this, go to the Control Panel, under "Internet Options", look for the "Content" tab, there should be a "Publishers" button, that will list the software publishers that you trusted, and another tab with untrusted publishers. If you see "Virtuali s.a.s", remove it from both tabs (especially if it's under untrusted)
- Reinstall GSX and be sure you reply YES to authorize BOTH modules when you launch FSX after the reinstall.
Then, if FSX still QUITS to Desktop, see the above thread about contacting me in private.