Swin, thank you!!
I will try that software. Basically I need to find a correspondence I had with someone from last year, for legal reasons, and I have tried using the "search" feature but even though it will find what I'm looking for, as soon as I double click on it, it just brings me to the LATEST correspondence rather than what I have clicked on.
I found this:
http://www.smsexport.com/
but for ME it gives me an out of memory exception after a while, but it's free and may work for others who don't have as many txt messages as I do.