If you can no longer log in because you have forgotten your password, please follow the steps below to change your password.
Where can I find the option if I have forgotten my password?
Under the button "Login" you will be asked if you have forgotten your password. As soon as you click on this sentence, another window opens.
What information do I need to provide to change my password?
Please enter your e-mail address and follow the further steps by e-mail to be able to change the password. 
What happens after I have entered my e-mail address?
After you have entered your email address, you will receive further instructions by email to change your password.
How can I log in again after changing my password?
At the end of the change process, you can log in with your new password and access your account.