Strange, I have tested on 2.0.6 and the GUI of Poweramp was all accessible for me. But you have to use mouse pointer function on the stock remote to click on the buttons/surface. It's very uncomfortable and slow this way, but it works. To get the full functionality and navigate more fluid in most of the Android apps, you need an airmouse (I suggest), mouse or touchpad. These apps are designed for mobil devices with touch screen. So another option is to use the HiControl app on your mobile.