Update 1.0.8 brings two awesome new features. Firstly you can display a message if your store is set to only allow free downloads to logged in users. This means the add to cart functionality is still disabled and you can tell your users to register to get it free.
Secondly you can now set custom download limitations for each membership plan, meaning you can offer X number of downloads on a silver, and more on a gold for example.
Make sure you grab the latest update, and if you haven't bought it yet, what are you waiting for? 😉