The correct folder location for the Couatladdons.ini is not gsx/virtuali but %APPDATA%\Virtuali. The GSX folder will contain only your customized airport and airplane files so, it's supposed to be empty on a new installation.
And, you are not supposed to worry or edit about the Couatladdons.ini file anymore, because all its options (which previously required editing the file) can be controlled from the GSX Settings page.