I'm not sure if you need to delete anything in the registry because of the demo because I've never installed it. But if the Activation didn't work correctly, it will still appear as something like a demo.

Check-in to Your Profile > Product > Customer Support > Search KB or Submit New Ticket. Search for KB #685 (without the #). It will tell you how remove the registry entry for the Captain Sim products.

After that, reinstall it (activation will be required) and see if that fixes it.

Mark