Since MS bought it, aren't there two versions, a legacy one called "Java" and the newer one from MS, probably not in Java and with all the cool kids (multiplayer mode) on it?
I remembered some friends complaining about the fact the since MS, they couldn't play as they did before because of two versions co-existing
Mojang is trying to fix this with resource and data packs, but even still, those are not full powered mods.