You can edit the Couatladdons.ini file but, the only key that can be removed, is the direct to GSX key, the one that opens the GSX menu without passing through the YouControl step (on an FSDT airport that has YouControl menus), the other keys will simply revert to their defaults, unless you remove the program that needs them. For example, removing the FSX\fsdreamteam\Couatl\ParkMe folder, will remove the ParkMe key assignment, which right now doesn't do anything since it's entirely replaced by GSX.