I have exactly the same problem.
Read all my previous replies, especially the ones about checking if you have the latest version of the program installed and the ones saying to verify is this scenery has parkings or not.
If that scenery has no parkings, it SHOULD be automatically discarded, that's how the latest version is supposed to work.
If you are SURE you are running the latest Couatl.exe (which, as of today, is 3.1.3532), and you have regenerate the Airport Cache with it, then this shouldn't happen, and we'll try to verify why this particular file is not excluded.
A possible solution, while we investigate this, is as follows.
- Open the file with AFX or ADE, change its ICAO to ENA1 and save it back
- Use the airport_visibility_ena1 = 0 line in the [GSX] section of the %APPDATA%\Virtuali\Couatladdons.ini file to exclude it from GSX as explained on the manual.
- Regenerate the Airport Cache again.
Again, this is a temporary fix, until we understand why, on this particular airport, the automatic exclusion of zero-parkings file doesn't work.