Hmm well I think the demo doesn't work as it should on my pc. The structure of the ZIP is very confusing, maybe you've packed something you didn't want? If I remember correctly, you own the pro version so I shouldn't have access to all of the files, should I?
When I start the .exe, I get an error that the _setup.dll is not a correct windows file or something similar to that. And ingame, I can walk arround but nothing happens except some bubbles moving upwards.
Could be my PC, because I have a Radeon 7000 atm...