You may change your email address by clicking on your email address on the top right of your player.
A drop down menu will appear after you click your email address. Please select "My Account"
From here you will see an option to change your login email address. Once you have typed in the address you would like to use, you will receive an email from firstname.lastname@example.org asking you to confirm this new email address.
Once this is confirmed, you may now access your account with this new address.