It could be that the demo versions were updated.
I don't think that is that case since I just tried my demo and it was working just fine with the pointer.
Here however is a quick way of just getting the address, since my pointer just doesn't seem to work.
Right after you start the demo and are in the main menu screen just start CoSMOS and search for a 4 Bytes value of 2700000 you should only get two results; choose the black one and when you get to the part where the timer starts just change the 2 to a 9 and you should get 160+ minutes of play time and you can add more later if you want.
[Edited by Meatbites, 1/20/2012 10:15:36 AM]
I'm getting 6 values for my search of value 2700000
I never got more than 2 but that is irrelevant, 6 addresses aren't that many.
All you need to do now is keep those 6 addresses and the moment the timer starts counting down(right after it is revealed that you have no fate) you should be able to easily find the one that only goes down by small consistent increments.
[Edited by Meatbites, 1/20/2012 12:57:00 PM]