Turn off updates in the FFXIII properties and it won't redownload anything, chances are it'll never get patched anyway, Japanese Devs and PC releases aren't exactly a thriving topic, Capcom(RE5 and DMC4 onwards were great PC ports, RE4 and DMC3 were horrible, broken, buggy ports done by some random company that Ubisoft outsourced to rather than do the port as it was outsourced to them in the first place) and FromSoftware are about the only ones that have ever made any actual effort in recent years.
Even Evil Within, despite being published by Bethesda and has resolution options for 4K is apparently gonna be locked at 30FPS.