Hi Corrine, thanks for reaching out with your Crio Pro WordPress theme questions.
You can change your admin email address from the Settings > General section of your WordPress dashboard. But keep in mind you’d need to confirm the new email account before the change actually takes place.
If you have multiple Admin Users you can remove a user from the Users dashboard as long as you’re not logged in as that user.
I hope this helps! Please let us know if there’s anything else that we can answer for you.