Is it possible to slice a track in half and mute just the second half? This is because I recorded the 2nd half on a separate track and want to listen to the 1st half of the first track, then the 2nd half of the second track.

Hope this makes sense.

If you choose 'Edit' from the Hotbox, on the first region, you can drag the ending marker (rightmost circle handle) down the timeline to where you want it to stop. Is this what you mean?

I'm working on a way to mute individual regions though, to make this easier.