Instead of reading the helpcenter article you can now also just watch the explanation video below:
Just click on your name on the right hand side and directly get to the personal settings. In the settings you can easily change your personal address and e-mail address. Depending on which language you prefer, you can choose between German and English. Of course, this setting is only saved for your personal account.
You can also change your password in this section. Please note that the new password must also be more than 10 characters long.