Hi Kristen,

You'll see what he's referring to at the top left. "Master" is to the left of the Bass, Piano, etc track names, and you'd drag it to the WAV corner of the box marked "Drop".

Another method would be to hit the WAV button, then "Save all track to WAV files with options". In the window that appears, check the "One WAV file per track" box, then click the "VST Direct Render (Save WAV File)" button.

Thanks
Kent
PG Music