The developers of the Dg Foto Art Gold are still in the business and the product appears to be updated as well. However, the inquiry above will work only when you're talking with the developers since they have access to the database, payment, and other stuff.
Since you were a customer of their products, I recommend checking the following page: http://www.pxlsoft.com/support.php
Through the details on the page, you will have the possibility to get in touch with the developers.