Oh, I see. Sorry. I thought you wanted to change single-click to double click behavior.
I had a good look at my kde bin directory and could not find anything that restarts the wizard in question (which is not to say it isn't there...). I suppose you may have to mv .kde to .kde.bak or something, restart kde afresh, and after choosing the settings you want start manually moving back the config files you want preserved. Is that easier than ressetting everything manually?
Another idea is to hit up the kde mailing list or #kde on IRC. I am sure some kde developer or power-user will have some idea how to restart the wizard...
Good luck on your search, and sorry to be so useless