Sometimes when you register your license it will register with the manager but not with the service. The GUI will show that you are running the Enterprise edition but the service will still complain that you can only have 5 devices and activities. If this does occur please use the procedure below;

1) Shut down the CatTools Manager interface
2) Stop the 'Kiwi CatTools' service from within the Windows Services Manager (by typing services.msc in the START (Button) > RUN dialog)
3) Restart the Manager interface (you will probably see an error message in relation to the CatTools Service not being available, but just click OK to continue).
4) Restart the 'Kiwi CatTools' service again and wait for a couple of seconds for the Manager to pickup the Service is running again.