I recently changed my default PDF application to Adobe Acrobat Pro instead of Apple Preview (it renders my vector drawings better than Preview does). But now in Finder instead of the thumbnails showing a preview of the particular PDF, I'm stuck with generic Acrobat thumbnails (see attached). I've looked through the preferences in Acrobat but can't seem to find the solution. I am missing something here? Is there a workaround? Thanks! Thom.