Want to control your renewal? From the Navigation Bar in the top right corner, click on Plus and open 'Account'. In here, click on 'Payment'.
Then you can choose whether you would like an automatic renewal (monthly or yearly), or to be notified whenever your renewal needs to take place so you can do this manually.
If you'd like to change your payment details or personal details, you can still disable automatic renewal and change these when your next manual renewal rolls around!