How can I update an email address on a profile?

You may update this information via their Profile page and the 'Edit Profile' button as long as the profile has not been claimed. 

Click "delete" next to the email address you wish to remove.

Click "Delete" to confirm the deletion. 

Enter the new email address.

However, if someone has already claimed that account using that email address please refer to the following FAQ's:

How do I update the email address on my Geni account? 

or 

How do I update the email address on my Geni account, if I no longer have access to that email address?