I'm having the same problem as is this post.
I have had this problem before and could solve it easitly using instructions found here. Apparently some part of my computer is not notified when adobe is updated and I need to enter the correct version of the program in some registry.
I have recently updated adobe (again!) to the new DC thing. As always, winshell is complaining, but my usual fix does not work any more. I think that the registry should be updated to something else than 'AcroViewR11' (I tried 'AcroViewR12', 'AcroViewDC' and 'AcroViewRDC' just in case) since the new name must be dc-someghing. Am I right? What should I enter in the registry now?