Restarting OCTGN should make it fetch the new update, the ImagePack for the champion cards can be found here.
KoF XII has been added, with partial rules text. It will be updated to completion over the weekend.
The game can be installed by following the directions here.
Image Packs can be found at – http://www.mediafire.com/folder/7x5tzceztx3of/Image_Packs