To change your email address you have to visit the Account section on Typito. You can click on the user icon on the top right and click on "My Account" button to get to the Account section:
Once you are in the Account section, you will see your email address listed under the Profile tab. Click on the email address content to edit the address to a new one. Once done, click on the "Tick" icon to request for change.
You will now get a confirmation email on the new updated email address. On confirming the email address via the email, you would have updated the email address for your Typito account.