GREAT!!! Wow, finally a solution... can't believe it. Vielen Dank nach München!!! ;-)

As I just figured out there is one thing left: The codes for the functions "video", "bypass" and "ALT" do work, but only "one way".

In other words: When pressing the button the function is activated, but when pressing the button again the function does not deactivate. On the original remote control it's just like expected. First pressing activates the function yet another pressing deactivatesthe function.

Any idea what needs to be done in order to make the Pronto behave like to original remote?

Kind regards and again my warmest thanks!
Marcel