If you can't unistall them from your system I would try to simply erase the folders with Eraser 5.7, as this will remove most of the files (make sure they aren't running when you do the erase). Then before you try to reinstall OD plus run a registry cleaner to try to remove any references to either program. This has worked for me before when I've had problems. Just out of curiousity, why do you not have SD Central? Even if you aren't subscribed to Object Dock, it is useful in managing what you do have and gives you access to the shareware versions of programs.
Hope this helps
