You can use Stardock Central or Impulse to de-install both of these. Or, if you don't mind brute force methods just delete the Window Blinds folder and the Object Dock folder. Your themes are stored elsewhere for WB on XP they're here:
C:\Program Files\Stardock\Object Desktop\WindowBlinds Just delete this to remove Window Blinds program
C:\Documents and Settings\All Users\Documents\Stardock\WindowBlinds Just delete that WindowBlinds folder as well if you want everthing removed including your themes.
For Object Dock they're here:
C:\Program Files\Stardock\ObjectDock Just delete this to remove the Object Dock program
C:\Documents and Settings\Big Dog\My Documents\Stardock\ObjectDock Library Just delete this as well to remove your Object Dock Library.
And that's that. For Vista the file paths may be slightly different but, that's the idea.