I finally managed to contact Magix after I found an email address on my computer going back a few years ago. The response came back from somewhere in Germany within 24 hours of my email. They agreed to extend the download period long enough for me to download. At this point I have not been able to "download all", despite following the directions, but have been able to access the online catalog and download what I needed at this point. Because of their response I am considering "upgrading" to v15, but before doing so want to make sure that I am able to download the content immediately following purchase.
Magix sent me a link detailing the terms of service regarding retaining paid for content, but I am still confused when it comes to this issue, as apparently are a lot of other people. In spite of their response, I am still not happy about the difficulty in contacting and asking questions of them without first having to purchase a contact voucher.