If you cancelled your Enote subscription and would like to regain your Premium benefits, you can reactivate a subscription by tapping Subscribe Now from the section of the app:
If you cancelled recently and still have access to Enote Premium, you won't see this option in the app. Instead you will need to reinstate your subscription from your Apple ID settings (the same place you cancelled the subscription):
Questions or suggestions? Email us at help@enote.com