DEMO: Closing the Tour Window leaves people searching for a Restore button
During the tour I pressed the upper right "X" sometime (in order to be able to see the photograph of John Lennon's guitar).
I figured out that I had to restore it using the menu on the left (which was a bit difficult, because I didn't remember where I was in the tour).
It would be nice that there would be a restore button for the tour that reopens the window. Furthermore, a hint would be nice (which could be shown e.g. on the first close operation) that said something like: "You closed the tour window. You can restore it any time you like using the ... button."