Re-Enabling Automatic Payment

Login to your Account Management portal. (See: Managing your Subscription)

Your Active Subscriptions are shown under the Subscriptions tab. 

Click the Manage button and then Update payment method to re-enable your automatic renewal. (This is also required to process an upgrade to your subscription level.)

The system may provide the option to use the last credit card you used for purchase, or you can Add Payment Method to save a different one.