Sims 4 won't run in 64 bit

The sims 4 absolutely refuses to run 64-bit on my PC. I've gone through all of the topics, clearing my cache, fresh installs of both the sims and origin, doing a safe boot, and I don't have any mods or CC installed (yet) so I'm at a loss here. I can say that it used to run 64 bit back when I bought it last year and I may have taken a small break between sessions. For more context; it'll open the game and go through the opening logos, but once it tries to hit that first loading bar it crashes to desktop without any warning every time. The legacy edition does load however, so I'm confused as to what could be causing the 64-bit version to crash on a 64-bit rig.