I installed GSX Pro and dont find Coulatl too. Howerver I have GSX item in MSFS menu.
This seems to indicate an antivirus problem, that has removed the .EXE assuming it might be a threat.
- Configure the antivirus by adding the entire Addon Manager folder to the antivirus EXCLUSIONS
- Run the FSDT Updater again
I have also problem with Zurich and and Vancouver for MSFS. Both dont have buildings of airports only jetways.
None of the FSDT airports for MSFS use, requires or are affected by the lack of the Couatl program, which they don't need or use. If the scenery is reported installed, it will work.
There has been some reports of whole airports disappearing, due to having reached the maximum number of object in a scene, usually associated with using AI traffic product with too high settings, especially when using AI Traffic Injection.