The subscription should renew automatically every year. If you have cancelled your account then you will need to resubscribe.
You can renew your subscription from within the app. Tap on the report limit on the main page to open the subscription page.
You do not need a Report and Run account to subscribe.
Cloud version
If you have a automatically renewing subscription then you won't need to do anything
If you have a pre-paid subscription then you can resubscribe from the web portal.
If you subscribed from within the mobile app, then you need to re-subscribe from the same platform (iOS or Android) that you made the original subscription.