One the center of the back buttons is the profile button.  Double tap to cycle through the available profiles. Each profile has it's own colour.  The 5th profile has no light and this profile disables the back buttons

How to program the profiles

1. Select the profile you want to program and press and hold the center button for 3 seconds. The light will begin flashing in the color associated with that profile.  The 5th profile has no light and this profile disables the back buttons

2. While the light is flashing, press and hold the back button you wish to program along with the controller button you want it to correspond to.  Hold these buttons until the light flashes red twice.  Repeat this for any functions you want to map to the buttons.

3. Once you are done mapping that profile, double tap the center button again until the light goes solid again.  The profile is now programmed and saved.