Open the WIBU-Key Software out of the control panel -> read the dongle and calculate the difference between the second and the third row ( third column) of the output, see attached image!You are using a network dongle for e.g. 5 clients but only one Editor/Runtime starts without demo mode. Serial number and Activation Key is correct on all PC´s!
If the difference is grater 255 only one client is allowed.
In this case get in contact with Copa-Data to change the dongle!