I thought the installer was supposed to do this but it did not remove the ParkMe Folder.
The GSX installer should do that, not the CVYR installer.
After deleting the folder I was finally able to get the GSX menu options to display.
This shouldn't happen, unless you changed the key assignments, to make ParkMe and GSX using the same hotkey, which shouldn't be done of course (if two addons use the same key, only one will work)
The othe problem I had was most of the CYVR terminals were displaying but there was one side that was missing. In the past I had my FSX shortcut set to run as Administrator under the Compatibility Tab. At some point this box became unchecked. Once I checked it again then CYVR displayed normally.
This shouldn't happen too. In fact, enabling the compatibility box is exactly what resulted for some users in parts of buildings not displaying. But if that fixed the problem for your in the opposite way, and everything is working normally, just leave it as it is.