If you have a hotspot that links to an image, you have to tap on the trigger twice to exit the full screen pic. The first click closes the left eye, the second click closes the first.
It would be nice if you could just gaze outside the image to close, or even an X close box for two seconds to close.
Thanks for reporting, I'll fix this in the next version. It might take some time until it's released though, due to a very busy schedule and the upcoming summer holidays.