Seems the mod loader isn't very up to date.I'm a retard, I patched the pirated copy of the game, from before I bought it (white knights sod off, I always buy and support the games I like)
However, having deleted the entire pirated game, the MSC loader refuses to start anymore. Rebooted my pc, cleaned ****, nothing works except recovering the pirated version's directory. When it's just the up-to-date steam version, the launcher won't launch.