MARTINBB  Go to Preferences > Basics.

Where it says "Open Quick Search Box at login", click the button to unselect this option.   
(Version 2.0.0.1447)

MARTINBB  PS: incidentally, like the previous poster, I cannot for the life of me work out whether there is actually an upgrade path. It certainly doesn't look like it. And in the past, when I have tried to update to newer versions, I have found it impossible. Nor, in my experience, is the program particularly good to use. I would certainly recommend looking for something better.   
(Version 12.0)

MARTINBB  I note that DevonTHINK is now using the ABBYY Finereader engine for its built-in OCR. I'm not sure what this indicates, but it might mean that they think it is the best of the available options. Then again, it might just mean they have made an advantageous deal with ABBYY :-)  
(Version 12.0)

MARTINBB  On the advice of the developer I have rebuilt the database file. This seems to have solved the problem. My thanks to him for the rapid response.  
(Version 10.4.3)

MARTINBB  Powerbook G4 1.67 GHz 1 GB, OS 10.4.11 latest patches.

I downloaded a trial a couple of days ago and imported 15 references from my Endnote library. Bookends "quit unexpectedly" within minutes and has done so several times when attempting to quit the application normally. More seriously, it has just crashed while I was simply moving the pointer from one item in the menu bar to the next. I have also been trying out Sente, and so far it has been completely stable. I haven't yet used the two applications enough to make any other useful comments about them.   
(Version 10.4.3)

MARTINBB  When synchronising, Cyberduck deleted files on my local drive that were newer than the files on the remote, then crashed. It has taken a day to sort things out, and some of the files are still missing. Beware.   
(Version 3.1.1)