I have the same issue. Followed the procedures and now there is no terminal. It's almost like FSDT KLAS is not active.
You mean there WAS a terminal *before* you did the Orbx-suggested procedure, but it's now gone ? Then the only possible explanation is that either the procedure is not correct, or you haven't followed it correctly.
If, instead, the terminal wasn't there to begin with, it's another entirely different issues.
If you have the Addon Manager and the Couatl menus visible, and KLAS is installed, then everything is correct on our side of the things.
And of course, KLAS must be on an higher layer on the scenery library than any other scenery that can potentially conflict with it, which is why the installer will place it on the top.