I purchased the software, but don't know how to play. Absolutely no information was provided after the purchase on how to get past the free trial download for the paid version.
From the moment you have purchased the application, a download link should have been emailed to you. If that didn't happen, then I recommend contacting the developers.
You can download the software using the link below in case you already have the serial number to register the software: http://www.ajpowell.com/bingohall.html
Use the following page to contact the developers: http://www.ajpowell.com/contact.html