Combined with Squirrelcart's advanced built-in Rule System, you can control access to downloads by any criteria you can come up with; based on any combination of customer account, order, date, and computer information.
Some of the many features include:
Squirrelcart PRO includes more support (120 days instead of 90), more download access (2 years instead of 1), and free installation.
If you are interested in more than one module, and more bang for your buck, Squirrelcart PRO is the way to go.