You might benefit from updating your image to a new openatv 6.1/6.2where did you enter these commands / menu im running VIX i dont see Usage and GUI in my menus
Try XCplugin, https://www.dropbox.com/s/4zv4yyr6taok6kx/xc.zip?dl=0it was on OpenATV when i got it and was slow and unresponsive. also same black screen on iptv channels then to.