Two hotspots. A wide band across the upper left moves on to Demo 8, and a tall area on the right returns to Demo 6. Apart from the small back link on Demo 2, it is the only way backward once the tour leaves the slides.
The frame above is drawn at the original proportions. Each dashed box sits where the 2009 hotspot sat and links to the same screen it did then, so the tour can still be walked end to end.