As long as you know your password you can change your login email address...
Via the website:
1. Sign in via the website with your login email address and password
2. Edit Profile
3. Enter your new email address
4. Click Update
I don't know my current password:
If you don't know your current password on the app, please submit this form with the following details:
1. Your current login email address
2. The email address you would like to assign to your account