This video helps you get started with Pathfinder. The first 15 seconds help you install and license Pathfinder. The rest of the video guides you through an example that illustrates several of the features in Pathfinder, including: occupant profiles and behaviors, elevators, stairs, and display options.
To run the example, you will need Pathfinder 2013 and this getting started file ([Download not found]). Download and then extract the *.pth file.