Click on settings, then Email, replace the current email with the new one. The password is required to change your email address, type the password, Save the change. Check your email inbox to get the link that will confirm your new Email, Click on the Link. The Email now changed, logout from the dashboard, Click on login. Let's first try to sign using the old Email, we have here an error "Invalid email or password", which means that this Email doesn't exist. Let's try now the updated one, type the password. Sign in.