Im having this same issue, and Im not very technically skilled. If I click the icon it gives me the menu and clicking play ends the program after a short loading screen. How do I run the main file?
You need to open folder where game is installed.
If you use Vista or Windows 7, there is an easy way:
right-click on icon, pick 'Open file location'.
There, double-click nwmain.exe
If running from nwmain.exe doesn't help, please check articles here:
And if your problems with NWN still persists, contact out support team and describe it.
Usually I would try to help you more on forums, but today / tomorrow is a bit hectic here at the office and I may not be able to get back to you ;)
just to add that fixed my issue, not sure why it wouldnt play then game when you click play but nevermind