FSDT Installer won't launch

[FlySafe]

i have some problem. following all suggestion of  Umberto but gsx not start

[virtuali]

- Configure the antivirus to add the whole Addon Manager folder to the EXCLUSIONS

- Run the FSDT Installer again, and choose Update

- If that doesn't work, try the Offline installer instead.

- If that still doesn't work:

1) Uninstall the FSDT Universal Installer from the Windows Control Panel.

2) Download the current version from our site of the Universal Installer, and reinstall it again.

3) If that doesn't work, restart Windows and try again