Paragmokashi,
Thomthom is right, it could be any number of things causing you to receive that error message. More than likely it's still reading the demo version instead of your purchased license. I recommend sending a screen shot of your error message to support[at]asgvis.com and someone from our support team will assist. You may also want to check out our "common error messages" list available here: http://software.asgvis.com/index.php?option=com_content&view=article&id=187&Itemid=187

Best of luck!