The license is expired. I have been searching all around and most of the answers are converting to files FOR powercadd. Essentially going the opposite way of .dwg to .pc9. Otherwise it is for exporting from powercadd as a single .dwg but I am hoping to find some method of converting them outside of powercadd.
I really hope you didn't have to shell out any money for that...
As Pendean said, your best bet is to get to the PowerCADD forums and ask those users. If they have a solution (even a paying one) you're more likely to learn about it there. Otherwise there might also be people that are able to write you converters. It is more costly but that might be a cost-benefit analysis worth making for your boss if the only alternative you have right now is re-buying powercadd licences so you can do manual conversions. (especially hammer down on the lost/gained man-hours of manual conversion)