To use Hamachi for KCVDS use it as follows.
First open Hamachi that you downloaded via Hamachi link.
Then click the small triangle shaped button. After click ''Create Network''
Pick a network name and password.
After doing this you should have made a new network.
Give out the network and password in the Lobby of KCVDS. Then when you get someone to duel host a HAM game.
In the IP Box type the number you see on top of your Hamachi window something like ''5.225.214.34'' which would be mine.
Have your opponent who is in your network to join the game. If all goes well you successfully hosted a game and it should connect. Welcome to your first duel!
If you are joining, join a network people spread in beta. After, join the person's hosting game.
The join Network button is in the triangle switch with the ''Create network'' button.
To change your nickname click the Gear>Preferences>Change Nickname.
It should take at most a day to change it.