It should work fine. Just make sure when you finish editing the file you save it in it's original format, and not a new 2013 format. Otherwise it will then become a 2013 file going forward (unless you want that?).
It should work fine. Just make sure when you finish editing the file you save it in it's original format, and not a new 2013 format. Otherwise it will then become a 2013 file going forward (unless you want that?).