In order to change the email on your account, you'll need to navigate to Account > Access and click on "Create New ActivTrak ID".
Once you click on that, you'll be prompted to enter an email address and designate if this will be an admin account.
Check the admin box and click "OK".
You'll receive a confirmation email with a link to finish creating your new account. Once this is done, log out of the old account, log in to the new one, and navigate back to this Access page.
Now select the old account and click on "Delete ActivTrak ID" to remove the old account.