Open the getquin webapp

Now go to your profile and click on the small gear icon on the top right.

Then click on "Email".

Now you see your current email address

If you want to change your email address, enter your current password in the field below.

You will receive an email with a link.

Open this link and enter your new email address.

If the input and confirmation was successful, you can now use the new email address for the login.