Terry Pratchett wrote:

I'm getting back into this now I'm running SetiQueue.  Is it possible to 
switch from the GUI to the command-line version without losing the work 
unit?  There's a couple of low-speed Pentium I's in the network here 
that are struggling:-)

If you create a file called "stop_after_send.txt" in the client's
directory, it will complete the current WU and then exit.

You can then uninstall the GUI version and set up the CLI one to
start with a fresh work unit.

(I don't recall seeing you post on this NG before - however I doubt
that anyone will offer you chocolate, cats or alligators as a
welcome here ;-)
-- 
Dom