SUBRE – Product Subscription for WooCommerce – Recurring Payments

Hello. I am interested in this plugin.
I have a few questions.

1) Is there a Pro version of the plugin? Why is it completely free?
2) I want customers to buy the products as they normally do with add to cart button but also want the the option to subscribe to the product by setting the quantity they need and state how often to auto order.
As I have seen in your video demostration, you cannot have both options at the same time. You either buy the product as you normally do or you make it a subscription product. Is that right?
3) When the times come to renew, what happens? Does the plugin auto create an order and sends it to the customer via email to pay?

Thank you
Vassos