it asked me if I wanted to run different couatl DLL files and I said run and to always run these files
Do you mean you saw the request from FSX to trust newly installed executables ? If yes, you were supposed to see TWO requests:
- One for the Couatl Scripting engine, which is an .EXE file
- One for the Adddon Manager, which is a .DLL
Have you seen both ? Have you trusted both of them ?