VideoStudio :: Splitting Audio Track

I decided to make the jump from X3 to X5 ultimate to give Corel a try again, actually the deciding factor for me was the included mercalli stabilization as it seems to be pretty good.

Anyway, I created about a 10 minute movie from a few videos, which is divided into many clips. Now I want to disable the audio from the video track and add a sound track. I found a nice sound track with the included auto music, but I can't figure out a way to mute the entire audio track from the video so I only hear the added music. I can only see how to do it one clip at a time. Is there a way to do all the clips at once?

I guess in hindsight I should have muted the audio from the video before splitting them into clips, but I've been used to using Vegas which allows you to mute the audio from the entire video track and thought I could do it later with X5.

Am I stuck with doing one clip at a time? Or do I have to save the movie then bring it in as one large clip then mute the audio from the video so I can replace it with a music track? the mercalli seems to work pretty good - which version it is they bundle with X5?