I believe one of our users downloaded a file that was created with a SolidWorks Educational license. I recall seeing a macro on the forums awhile back that would identify any files in an assembly that were created with SolidWorks Educational version (rather than scrolling through the tree looking for a grad cap icon). I'm unable to locate the macro. I found a post on the site below stating knowledge base solution S-040508 contains a macro for this, but S-040508 doesn't exist !?