It's crashing when ShowWindow is called on the viewer, in what looks like a subclass proc something has installed that is now in deallocated memory (e.g. code that was in a DLL which was unloaded without the subclass being removed).
You have MaxTo installed which modifies how windows behave when shown and resized, so I would suspect that as the cause. Does it still happen if you uninstall it? If you no longer see the problem with it uninstalled, please report the issue to them so they can fix it.
If uninstalling MaxTo doesn't make a difference, please send us some sample images that cause the problem. (From the DMP files, though, it doesn't look like the issue should be tied to any particular image, as the crash isn't happening in code that deals with the images themselves.)