Please follow below steps to change the credit card for your subscription.
1. Please go to https://cloud.connectedpdf.com/appstore/app-list, login your subscription account, and click on “Payment Options”.
You will be able to see your current credit card for the subscription.
2. Click on the credit card, there will be edit option with a pencil sign available. You can click on it to change the credit card and edit the credit card information and save it.