You can update your email on file under your profile settings in the Branch app! To update your email:
Navigate to the account tab within the app.
Tap on Profile.
Enter your wallet passcode.
Next to your current email, tap the arrow icon.
Enter your new email address.
Check the new email entered to verify the update.
Continue to the next verification step.
Check your text messages for a verification text.
If you are still having issues updating your email please contact Branch.