You can manage your SmartDraw Subscription by logging into My Account.
Once logged in, choose "Licenses & Subscriptions":
If you have multiple licenses, click on the license ID and "Manage License" for the license you want to manage:
On the next page, click on "Manage Billing":
On the Manage Billing Page, you can make a payment, update your payment information for future renewals, and disable auto renewal.