On the left side you see the main window, where you can map up to 11 intervals to an incoming midi note, from a keyboard or an Pad controller.
You have access to the settings of the Device here and you can also store your settings to a file and relaod it again, so you don't have to do all the work twice.
In the middle you can select a scale and set the root note. The notes of the selected scale are displayed on a piano keyboard.
There's alos a button where you can get information about the Device, which Version you're using and if there's an update available (only if your computer is conected to the internt).
on the right side ther are 16 additional keys you can map to different functions. this view is hidden, when you first load the Device and you have to clik on the little (+) on the top right side of the Device to unfold it.