Keep looking
After spending many hours late into the night trying to set up my computer to allow this app to communicate with it, I gave up. I found a different app which requires no additional hackery. All of these methods require that you backup your messages onto iTunes without encryption. Do that. Then find an app or program for your COMPUTER. Dont waste time with iPhone apps for this purpose. They do not make the process quicker. It took me only a few minutes to complete the process with the other program and I didnt have to do any fancy stuff. All Im saying is keep looking for another method. iPhone apps just make a simple process extra confusing.
Ultine about
SMS Export Plus - Backup or Save text messages