As your email will be registered already, please choose directly the LOST PASSWORD option.
The same option you can find at the LOGIN screen.
Now the system will ask you for your email to send you two mails. One mail with the request for the new password and the second email with the new password.
With those information you can LOGIN again with your credentials and enjoy the full access to the content for the test period.
For any questions or issues you face, please send us an email to firstname.lastname@example.org.