Reply to Virtual DJ LE question- NEED HELP!

I am probably going to buy a open box numark mixdeck at guitar center, but the virtual dj le software is not in the box. The clerk told me I could download it for free online. My questions are 1: will this work, can i configure the downloaded version to the mixdeck, 2: is it worth downloading? or is there other programs that would work with the mixdeck instead?