Hello everyone

i had a version of the game( 1.4.382 )and it was working for me fine
i updated my game to the 1.5.387 version so that i can use hacks and cheats
but fortunately Multiplayer game doesn't work with me like it was working with the 1.4.382 version

the things i wanna knew is that :

1: Does the 1.5.387 version Multiplayer works for free? or i have to buy a serial so that i could update the game to the 1.5.387 version and play Multiplayer?

2: Is there any updates after the 1.4.382 version? i saw somebody talking about a 1.4.387 version? if so please provide me for links

3: If there isn't any of what i mentioned
please provide me some links for a nametag hacks to the 1.4.382 version
cause i searched for any of them but in vain