If you want to change/update your credit card that is used in Picreel account, follow these steps:
1.Navigate to the Billing section in your Picreel account.
2. Make sure Secure Checkout is chosen as the payment type. Then, click Upgrade.
It doesn't matter what plan is chosen, if you want to update the data.
3. In the window that pops up check Only update my data. This will hide the payment amount and update your credit card.
4. After you enter the updated data, press Update.
Your credit card is now updated.