So Square-Enix seems to still be learning more about their PC gamer customer base. If they had a true understanding, they would have not locked the game down to 720p. Luckily, we are the PC Master Race and we are fully capable of solving our own problems. GeDaSaTo (Famous for making similar fixes for Dark Souls 2) has fixed this with a very simple program.
FREE +6 FFXIII PC Trainer