Your download is a 30 day trial of Altaro Hyper-V Backup Unlimited Edition, which will switch to the Free Edition automatically after 30 days, keeping you running for free on 2 VMs - forever.
Altaro offers you the ability to use the product for free for up to 2 VMs. No time limitation, it’s yours to use as long as you please. Why? We believe in our software and believe that once you start using it, and your requirements increase, we’ll have convinced you that Altaro Hyper-V Backup is the right fit for you and will have earned to be upgraded to one of the paid editions.