That happened to me, too - then I realized that the update itself wasn't new (from Jan I think) but only the updater, which has been re-released a few days ago to be compatible withthe latest VI software.
In other words I think no files were updated in both our cases because we had already updated them.
That is my theory anyway - I could be wrong!
EDIT> it appears this theory IS wrong :) ... see posts further down.