So this was said in a topic recently posted on the announcement page, but for those of you who didn't quite understand it, I'll post this for you.
At this time you are now able to patch the full game client. This is done by opening up the client launcher, (It will do a tiny patch through the launcher) then you run the game. Once the game loads up, if you look at the bottom left hand you will see something that looks like this:
If you do, please leave the client running until that reaches 100%. Once that is done, you will be 100% ready to play the Onigiri US Closed Beta at 1:00pm PST
If you do not know what time it is on the west coast of the united states atm please click the link below.
http://www.timeanddate.com/worldclock/fullscreen.html?n=234