You can manage your subscription, including updating your email address, from your profile.
Sign in from the website(not the app on your mobile device) and then click on your name (or the profile icon) in the top right corner of the page.
On the next screen, your personal data will appear, but you need to click on Subscription and then follow the prompts by clicking "here" then entering your email address.
This will take you to the page where you can edit your email address.
Article is closed for comments.