Hello!
Before running the game updater, you have to download a separate patch zip file - we have a stickied thread with
Install Instructions in this very forum section. Follow the directions, and if you run into problems at any step post back here.
Before patching though, make sure that you don't have any PlaneShift-related processes running in the background, if you have run PlaneShift earlier today. Easily done by just rebooting, and then proceeding with the update steps.