no, if you have a fully licenced version and if you do the update then all you need to do is enter the licence key to do the updateBro if I update with the "Not Nulled" version will it break the site? Forgive me if my question sounds dumb, just need to be sure.
and it will convert to the fully licenced version
as always make a backup first then do the update
how ever if you do not have a licence then yes it will break it when you run the update.php file