To subscribe for cloud service to existing Notezilla , you need to create a Notezilla.Net account. To create an account, right-click on Notezilla icon and choose 'Sync'--> Create a new account. Key-in the necessary details and create an account. After creating an account, activate your account by clicking on the activation link emailed to you separately. Once the account is activated, all your notes are in sync with the cloud.
To Buy/Renew your subscription click here: http://www.conceptworld.com/Notezilla/BuyNow
Once you purchase from above link, your subscription dates will automatically get updated.