Start the program, when you see the familiar clipboard interface where you click to go online/offline/h2H, you'll see a button marked "Film". Click that.
Now you see four buttons along the bottom: Open, Trail, Setup and quit.
Open gives you a primative dialog box to choose which film to view. By default they're numbered (i.e. flim1); but you can rename them to something more significant using explorer (Pyro, can't this be fixed?).
Double click one.
The slider bar to the left of the afore mentioned buttons is playback speed (the middle position is normal speed), the trail button adds smoke trails to the wingtips so you can see the paths they took.
Above the buttons are four cassette recorder type buttons and another large slider bar. The buttons do the same as your hi-fi, that's to say start, fast forward, rewind etc and the slider bar shows where in the film you are.
