MACRACHEL  Excellent! And free! I initially had the "No iPhones found" error that appears common. I followed the advice on the related forum on the Micromat site, including unchecking "Run helper app in the background" in the preferences. I had to quit and restart several times, and I'm not sure exactly which fiddling did the trick, but eventually I launched the app and saw all my conversations, including the ones my daughter had deleted since my last sync. Fabulous! It is a delight to be able to easily and quickly generate a PDF of a year's worth of text messages.  
(Version 0.99b11)