Whether you've lost access to an old email or are updating it to a more relevant address, email accounts can easily be changed via the Zenva app.
Please note, though, that changing your e-mail on the Zenva app will also change the e-mail used for the Zenva Academy website as well.
To change your email on the Zenva App:
1) Click the My Profile icon on the bottom menu to open your profile view.
2) Change your email address in the email address field.
3) Hit Save Details to save your changes.
You should receive a pop-up indicating whether the changes were a success or not.