Long time Serviio user here, but haven't used it in a few months so some updates have occurred that might have caused my problem. Samsung smart TV (UN40EH5300), MacBook Pro, both with current level of softwares and operating systems. Selecting Allshare Serviio from Source menu is fine, next screen is select Contents Type (Videos, Photos, Music). I can't do anything on this screen. Can't arrow up or down, can't select the highlighted item (Videos is highlighted when the screen comes up). No button works, not the ok button, return button, and can't exit from the screen either (though of course the whole Source menu goes away on it's own in a minute).
I did do extensive searching online and on this forum.