Wow! Thank you so much for this thread. Initially I ordered some no name product for Amazon for over $50, then I bought 2 of these on discount during Black Friday weekend for $21.25 per piece.
Putting it in Launchpad S mode works nicely in Hauptwerk and I can choose colors, while in Behringer mode it just continuously lights up green. Also that booklet is not completely useless as I read it is possible to increase brightness by pressing MIXER, USER1 and USER2 buttons at the same time, and decrease it by MIXER, USER2 and SESSION.
For completeness of info: to switch between TC64 and Launchpad S mode need to hold 2 MODE buttons in the top left corner while connecting USB cable. When they flash red twice it is Launchpad S mode, when they flash green it is TC64 mode.
Also, cool thing with TC64 is that you can use those additional 16 buttons as the other 64 in Hauptwerk, so actually you have 80 buttons at your disposal. With 2 of them you get 160, that should be more than enough even for the biggest 5 manual + pedal organ
Thank you