You can enable logging without being able to access the GSX interface, this way:
open the Notepad and type the following on a new blank file:
logFile=couatl.log
(please note logFile is written beginning with a lower case l and a capital F )
Save the file as couatl.ini in the %APPDATA%\Virtuali folder, run the sim and then exit after it finished loading. Check your %APPDATA%\Virtuali folder and if there's a Couatl.LOG file there, then send it to me same as the .cfg file.