I'm sorry but I don't follow you.
You mentioned a "Couatl Debug Window", so I assumed you saw... a Window. So no, you don't have any window then.
- 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_MSFS.ini in the %APPDATA%\Virtuali folder
- Restart Couatl from the Tray Bar or start it from its icon on the Desktop
- Check your %APPDATA%\Virtuali folder and if there's a Couatl.LOG file there, post its content