Unfortunately I posted this review to the wrong page and I can't see the way to delete it... so I better write something about this script now
I tested the script and it doesn't appear to work, however this is probably not the fault of the script itself. In the past few days 4chan has started limiting the number of connections per second allowed, giving 503 errors and even blocking some people who connect too much. This will obviously affect any script which downloads the entire board.
It does exactly what it sets out to do, plus a neat little interface when you search. All's well here :)
The script works perfect and is an excellent tool for finding threads. Very quick indexing.
The one thing I'd do to improve it:
IMO, there's no need for a confirmation dialogue when one pushes the Delete Index button. Its such a low risk decision, just let me delete it without having to confirm.