Accessing your Giver Profile information here
When you have accessed your Giver Portal you are able to manage your Generous profile details.
Once you are in the portal you will see on the left-hand menu Donor you need to click not to this to expand to see on the left-hand menu Manage Regular Gifts
This will display all of your regular giving - click the one you want to manage the blue "Manage"
You will then be able to add the new payment method details by selecting the Payment Configuration Details tab
If you have more than one Regular Giving set up - make sure that they are all updated with your new details