Hello,
Do you mean changing settings on the settings page (http://www.chess.com/home/livechess_settings.html) and reloading Basic Live Chess to get new settings from the server? If so, please note we've found an issue related to that and we'll install a patch soon.
Cheers
Whenever I change my live chess preferences to enable premoves, somehow it resets by itself either immediately or within a game or two.