I'm afraid this does not appear to work on my system (Ubuntu 16.04, 64bit). None of the key combos work (Shift-ctrl-` etc.), and dropping an image just crashes

I'm afraid this does not appear to work on my system (Ubuntu 16.04, 64bit). None of the key combos work (Shift-ctrl-` etc.), and dropping an image just crashes it. And I was all geared up for karateka...