You do not need to update ObjectDock. You do need to extract the contents of the zipped folder in order to use them.
If they're backgrounds, then you can extract them to either of these 2 places:
C:\Program Files (x86)\Stardock\ObjectDock\Backgrounds
C:\Users\Brian Berkowitch\Documents\Stardock\ObjectDock Library\Backgrounds
If they're icons, then extract them here:
C:\Users\Brian Berkowitch\Documents\Stardock\ObjectDock Library\Bundled Images