Nice! Thanks so much. I wasn't able to find anything about this in the FAQ, even after I read your post, but I did manage to find the Shelves folder under Library/App Support/QS, and deleting its contents allowed QS to launch finally. Beautiful! Although now I'm quite used to using Spotlight at this point.
What is the deal with this by the way? Why does this need to be done manually? And is there a way of preventing it?
