According to your avatar you have registered Cross DJ. This can be downloaded at
downloads.php?cat=54.
The older products of mixvibes were only distributed by CD as in that era it was the common way to do. Be aware that development stopped long ago and all support ended like 7/8 years ago. So it is not supported by the latest operating systems.
Some are available at get.mixvibes.com if your license key works. Else it would be best to give Cross Demo a try so you can check if upgrading to Cross (DVS) would be an option for you.