There has been no update to RedNAND, as far as I'm concerned. You don't really need to install it in the first place, unless you're going to mess around with vital system files (thus causing a brick). If you just want "backups", also known as illegally obtained games, you can simply use the Brazilian USB method. Most things that can be done on RedNAND can already be done on SysNAND, besides being able to recover from almost any brick.