We currently use a platform called Open Collective to manage our payment plans, subscriptions and billing information. .
To manage your Cobudget subscription, sign in to your Open Collective account. Make sure you sign in with the same email that you created your account with when you first signed up. There, you can change your billing information, cancel your subscription or choose another payment plan: http://opencollective.com/cobudget
Here are the direct links to our payment plans: