To change your email address on file for your PartnerPage account, you will need to simply invite the new email as a new user to join the account:

From here, you will fill in your name, and new email address, and click 'send invitation.'

The new email address will get an email like this:

After clicking 'Join the Team' you will be taken to this page to add your name, email and then create a new PartnerPage account with the new email:

After clicking Join PartnerPage, it will take you to the existing dashboard for your company. From here, click on 'Settings' in the lower left corner, and click on 'Manage your team and their accounts.'

Simply click on the old email address that you want to remove, and click delete: