To change your subscription settings, head to the Subscription section of your Settings page.

If you are on the free Squire account, this page is the place to upgrade to a Knight account. You can select a monthly or yearly plan (the yearly plan gives you two free months!) and your payment method - Stripe for credit/debit cards or PayPal. 

Alternatively, you can also upgrade by entering a promo code. Enter your code into the box at the bottom of the page and then click Claim.

If you are a Knight, this is the place to update or cancel your subscription or take part in the CardCastle referral program.