The folks over at Futaba Flyers Club posted a download for the FX-40. It includes the T14mzUtility calibration utility (for the FX-40) and a radio update. The update is identical to the one Robbe released back in April 2006.
If you're an FFC member, get the file from their downloads area, otherwise you can find it over at http://www.rcfan.com/radios.html
Note to 14MZ owners :::: while you may be tempted to try these out on your radio, DON'T. The FX-40 and 14MZ have different switch layout and other things that may cause your radio to cease working. Even if you get it to accept the patch (or run the calibration utility), there's no way to know what things it might break. So avoid an unnecessary trip to the service house and wait for the proper update for your radio. Banging Head
Note to 12MZ owners :::: will not work on your radio!