You can't re-download tracks you PAID FOR unless you pay an additional subscription. Not only that, some tracks I wanted to re-download were unavailable for download even though some of them I was able to find the same track available under another album or release. Seems like shady business practices to me. Lastly, if you have a large library you want to re-download, you can really only do it one page of 20 tracks at a time, otherwise the site derps if you attempt more and you might not actually be downloading your entire library even though you think that you are.