To change information about a specific contact, such as to change their email address or name, click on their item in the list to put that contact into edit mode. When you do this the contact will appear in an editable form:
Make the appropriate changes to the fields by editing them as needed and then click “Save & Close” to commit your changes.
Your changes will take effect immediately.
Test your changes particularly if you have changed the email address to ensure messages sent via your contact page arrive safely.