Registration Payments - How To - Enable Subscriptions
Version 2.0.3 of the add-on introduced support to subscriptions, both with EDD and WooCommerce.
How It Works
I Use WooCommerce
Learn how WooCommerce subscriptions work: Introduction to WooCommerce Subscriptions
It's required to install and set up:
I Use EDD
Learn how EDD subscriptions work: Recurring Payments - Overview