You send an e-mail to: info@rolandziegler.de
He will reply with an invoice and instructions for making payment.
Once you have made payment (PayPal is the preferred method), he will send you another e-mail with the download location, and your license code.
Roland is very fast with the reply and sending you the link for downloading after payment.
Just remember that he is in Germany, so if you're here in the states, there is a large time difference.
Of course, tomorrow is Christmas, so don't expect him to reply until Saturday.
If you want more info on TransDem, there is a thread in this forum on the new version 2.0.