I'm trying to use this mod because it's really helpful and I need it, but it's asking me to have forge version 31.2.5 or above, which doesn't exist. When I go onto the forge files website and look, it only goes up to 31.2.47 and that's the latest one. Please help :D

31.2.47 is later than 31.2.5. The 5 is a 5, not a 50.