How do I turn off background music in a project?

Good afternoon again.  I was given an old project done in Captivate 2.0 that needed revisions .  The individual who did this project added music to it; however, the participants who have already done this training have found it annoying and do not like the idea of having to turn it off.  I would like to do it permanently for them so they don't have to bother.  How do I do that?

Thanking you in advance for your help.

Captivating1