Hi,
Check the BeerSmith directory - you should have "bak" files for all of your main files including Recipes1.bak, Recipes2.bak and so on. These files can be renamed to .bsm and opened normally.
Also - please drop me an email as I would like to better understand what happened. The online update process does not directly change any of the recipe files, so I'm having a hard time understanding how you could lose them.
Thanks,
Brad