If you like you can run BPM in a window by going to the setings in BPM and checking the 'start BPM windowed' checkbox under the interface section. Additionally, we will need to use Steam Big Picture Mode (Henceforth referred to as BPM) for any and all configuration as the interface for normal desktop steam is not available.
This is because the Steam Controller uses the Steam client to do all the input device emulation and is fully required to use this controller in anything but a basic mouse style mode. Firstly we are going to need the steam client installed.