Somehow in copying my oblivion directory to a backup then copying back (which I've done tons of times) my "oblivion data path" has been set to the drive to which I backed up.
So, TESlodgen or TES4edit now look in the wrong directory and find nothing.
I have windows XP but uninstalling and reinstalling oblivion is still a pain, is there a file or a registry entry I can fix instead?