Before you update, make sure that you back up any mods that you may have installed, since installing the update will replace all of the game's files, including images and audio. Your savegame files should be fine, since they are located in a user directory.
Arthur provided the details in
his announcement post. It's unlikely that the other game distributors have the update available so soon, so if you purchased VF from another site, just follow his instructions for how to get the game from us.