To make changes to your billing card, make sure you are logged in to your account and navigate to the user settings page. Once you are there, click the "change card" link under your current billing card. If you are adding a new card for the first time, click the "add card" button.
Once you see the form, add your new card information and click the submit button. If your card information is valid, you will see a new card item in the billing view that reflects the new information.
Your new card will not be charged until the next billing transaction begins depending on your chosen subscription plan.
It is important to know that your information is safe with us as we promise not to abuse or sell your data and use TLS level security (it's better than SSL).