Magic Music Visuals

I recently bought a USB footswitch and assigned the key for nest/previous scene. Worked on the first try but now, noting is working...

Even the keyboard shortcut doesn't work... Is there anything I can do to fix this?

Can I change the key combination as well? Usually I use Canadian French and the Ctrl+ ] is a weird combination!

Thanks!

Yeah, nevermind, I had the wrong keyboard configurered, that's why it didn't work!

Still, any idea if we can change the shortcut?