Our daughter's computer received the full 1.2.13 update and can access tridents, blue ice, etc. but neither of our computers have received the update. We have tried updating java, updating Minecraft, restarting, etc. but cannot get it to kick in. We can't even see the updated items in creative mode on her game, but she can for example throw a trident to us and we can use it. We just have no access either on our games or her game.