Downloading & Installing Object Desktop programs onto different drive than C:

Hi.  When I built my computer, I foolishly created only a 50GB partition for my C: drive, thinking this would be sufficient for Vista.  I've since learned the errors of my ways, as that partition is now just about full and I'm getting "lack of space" error messages (despite having 900 GB free throughout my other drives).  I created a separate partition (K:) for my program files, and whenever possible, I install all programs there.  However, Stardock stuff seems to want to go to the C: drive (C:/program files) instinctively.  When I use Stardock Central for updates, they all go to C:.  However, I've removed my Stardock folder from C: and it's now on K:.  So, I can't get any updates to install, since they no longer see any Stardock/Object Desktop items in C:.   The download proceeds, then I get a "installation failed" message.  So, my question:  How do I tell Stardock Central to put any updates into my Stardock folder in K:, and not on C:?  I would be happy to uninstall OD and reinstall, but when I go to My Computer/uninstall programs, OD is not listed as an option to uninstall (I'm wondering if only items installed in C: are listed there).   Stardock Central is listed as an item that is available for uninstall.   I hope this makes sense, and I hope I haven't screwed everything up!  Thanks for any help.