Personnally, I've never use the fileplanet files, so I can't really figure out if there was a direct way to fix it.
The real full version of gunz is here...
http://www.gunzfactor.com/forums/showthread.php?t=12052
So they say.... don't scream at me if you still have alittle update to go....
Also, try using the bitcomet method, its fairly popular, and brought some good results. Open your gunz launcher, then go to the maiet folder and open up the newly created gunz file. Open this with a bittorrent client (people debate on wether azerus or bitcomet is better, test it yourself) then, once the download is finished, get the old folder and replace the CONTENTS of that folder, not the complete folder, with the newly downloaded ones.
I'm sorry, but your gonna have to wait awhile either way, but the full download seems like the better deal....