The error you're receiving is related to the fact that the serial number expired and it has to be renewed. Since the developer controls this procedure, you will need to contact him or the sales team to figure this out. It is possible that the serial number has a limited number of activations available and it appears that you've used them all.
Since Bias-Inc has ceased its activity, you will need to call them using the number provided on the support page that is still available for customers and users.