I just updated my theme to the latest version. The images from the demo that I was using on my site then immediately disappeared and there are now instead broken links for all of the images.
I installed the theme and demo content on a fresh WP instance and it has the same issue.
It seems as if all images in this path are now receiving 404 errors. My guess is that you no longer host the images and that they were over actually downloaded to my site as part of the demo.
If these cannot be activated - can you email or otherwise send me these images?