The app does not allow me to add mouse. I click 'add device' and it shows me the bluetooth settings for Mac (where my mouse is already added). After this it does nothing. Does not add my mouse to the system meaning I cannot change the button functionality. There is a Screenshot of this page on the App store description for the app and it doesn't even allow us to get to that page. It is unfortunate given the mouse itself is very good but I would love to reconfigure the controls.