Hello @Craig Rudolphy,
Thank you for reaching out to the Quicken Community, though I do apologize that you are experiencing this issue.
To update your Quicken account with the new credit card number, you can simply deactivate and reactivate the account. For instructions, please refer to this support article for instructions on how to deactivate and reactivate. Once reactivated, the account in Quicken should automatically be updated with the new credit card information and download transactions. I hope this helps!