Playing "Grab Mechanics" demo scene and controller won't show in Unity

Im running Unity 2017.2.0f3.

I imported both:
HoloToolkit-Unity-Examples-v1.Dev.2017.2.1.unitypackage
HoloToolkit-Unity-v1.Dev.2017.2.1.unitypackage

I applied the Mixed Reality Toolkit > Mixed Reality Project Settings, Played the scene, and the HMD shows the scene but the controller isn't shown, although I can hear the "click" when I press the trigger.

I get this error:
ArgumentException: Input Axis CONTROLLER_LEFT_STICK_HORIZONTAL is not setup.
To change the input settings use: Edit -> Project Settings -> Input

Is the some documentation on how to setup the Controller and Input?

Thanks.