I just got an nvidia shield and I'm using an Aerb airmouse with it : http://www.amazon.com/Aerb-Wireless-Keyboard-Multifunctional-3-Gsensor/dp/B00K768DHY

Everything works great EXCEPT for the back button, which I believe is mapped to a right click instead. The ESC key on the back keyboard is mapped to the back button, although it seems to only go back when it feels like it. Is there any way to fix this?

I tried the following app: https://play.google.com/store/apps/details?id=innerlife.keyboard.multilanguagekeymapredefiner but I was not able to map the key with it since I guess that button is not being read as a key.