if you go to the brain editor and edit your current "in-use" brain, do you have the ability to open (expand) the catagories on the left side of the screen?
if not, the brain database might be corrupted.
depending on what caused it, you might be able to use the brain.
try going into the brain options screen and resetting options of plugins and APPLY the changes, then close ultra hal. reopen the brain in the editor and see if the catagories are expandable.