Login to your Anima account with your current email address and password. Once you are on the Dashboard page, click "User settings" on the left hand pane.
Click on the top tab, labelled "Login details":
Enter your new email address in the box labelled "Update your email address." Then click the blue button labelled "CONFIRM NEW EMAIL." You will be required to verify your email address again once you change it. Once you confirm your new email address, a new screen will open with further instructions on how to verify it.