I have a nice Amlogic S812 Android 4.4 running TV Box with an airmouse/wireless keyboard as the main remote control. I mainly run Kodi and Netflix at the moment.

Anyway, Kodi takes a while to start and stop because it is attached to a very large library on my NAS so I figure that the best thing to do would be to switch between apps rather than stopping Kodi and running Netflix. Unfortunately I can't figure out how to do this. The remote has a single key that is labelled with the icons for back and home. This ebay listing is similar to what I have, although mine has a keyboard on the back of the remote.

I am pretty new to Android so appreciate any advice.