You surely have an .INI file, it's again right there in the last screenshot you posted!
And, as I've said, if you have Explorer configured to hide file extensions, you'll see just the name of the file without the .INI extension, assuming it's registered to some program ( sometimes it's Notepad ), but the filename is specific enough to prevent any confusion.
And, you must remove the WHOLE .INI file! Nowhere I ever said you are supposed to open it and "search" for some "ini line" inside of it. Just remove the file, and restart the sim or, if is still running, restart Couatl.
Note that, you could have obtained the same result by selecting the "Airport" top node in the list of parking spots in the GSX editing page, which would result in selecting all parking of the airport, and press the "Reset" button. I said "remove the .INI", because it looked easier.