Once you are logged into your Spaceship account, go to Launchpad and navigate to the Products and tools section > Email. Launch the Spacemail Manager widget and click Manage next to the desired subscription. In the Renewal section on the right side of the page, click the Extend Subscription button and proceed to checkout.
If you wish to enable the auto-renew option for your Spacemail subscription, follow these steps:
Log in to your Spaceship account.
Open Launchpad and find Spacemail Manager.
Locate the necessary Spacemail subscription.
Click the Manage button.
Locate the Auto-renew field.
Use the ON/OFF toggle to enable or disable the auto-renew option.