-I tried it just a little today, because of yesterday's update. During first launch (portable 64 bit version) I asked for hotkeys a la Windows (F5=refresh, etcetera), but the GUI was their private setup (F5=Copy, etcetera) all the same. When I then opened the otherwise brilliant Button Editor, it asked me to click the button that I wanted to edit, but stayed in front of the buttons! => I had to first grap and move the editor's window, before I could use it.
This was all I got to try, before I was called away. Still, I want to test it more thoroughly tomorrow; despite these minor "errors", the program looks very capable.