Is this client the wallet?
https://forum.thesupernet.org/index.php?topic=247.0
that is really old. You will be on a hard fork once block 330000 hits for NXT because of NXT releasing MS (Monetary System)
The most up-to-date SuperNet client is located on NXT's forums
https://nxtforum.org/lite-multigateway-releases/supernet-v1-4-7-1/
and I would suggest following this forum as well for news regarding SuperNet.
Just remember SuperNet (UNITY) is an asset of NXT (at least for the moment). You will need to create a NXT account in order to hold SuperNet (if not you can't trade it away to the NXT AE, or even secure your account with a transaction.)
Thanks!!
Another question. Where do I create my NXT account? Or do I just download the NXT wallet?
You download the NXT (or in this case the SuperNet) wallet that I linked. Once it's done downloading you will get a .zip folder called "supernet-1.4.7.1.zip" where you need to unzip it to wherever you want to hold the files. Inside should be a folder called "supernet-1.4.7.1" that will contain the NXT wallet files.
If you use Windows (after doing the above)
1.) look for the file named "run.bat" and right-click ->copy to desktop (to create a shortcut which I find easier to use )
2.) Double click the shortcut you created and it should start running the nxt.jar file.
3.) Let it load then go to localhost:7876 where you will be greeted with the NXT login screen.
4.) Enter a passphrase (think of this as a password to your whole account.) If you lose this or a hacker gets a hold of the password then you lose your account. I would suggest adding things like %$!,uppercase and lowercase letters, and other types of symbols to have a more secure password.
5.) Your account will then login.
Here is everything else if I forgot to mention anything (while its a little outdated, its in essence what is necessary to set up an account)
https://nxtforum.org/nrs-client-how-to-help/(nrs)-(0-8-12)-latest-nxt-client-and-english-tutorial-(2014-03-21)/
oh and if what I wrote above is a little too complicated, and you just want to run the basic NXT client (you still will have access to your SuperNet assets just not the "SuperNet" tab that appears) I would suggest using the client located http://nxt.org/ because its a simple .exe installer. It's regularly updated by the creator 'Wesley' and even gives notifications when there is an update.
btw. In order to trade your SuperNet on the AE and/or secure your account you will need at least a few NXT.
Cool. Thanks!!!