Removing externally generated columns

Hi all,

Probably a bit of a newbie question here.

While I've been setting up tests using the external script mechanism (and working out how to drive it) I've generated a few random columns. (In case anyone doesn't know, using BBWin as a client, placing a file into BBWin's transmit folder causes a column to be created automatically in the Hobbit display with the name of that file.)

Now I've done my experimentation these random columns are redundant. I've deleted all the /rrd, /hist and /histlogs files that support the pages, but the columns won't go away. Anyone know how I purge these redundant columns (and where the data driving them are held)?

Graham Nayler