Back Up Text Messages To PC Computer So That Can Read Them Or Print Them?

I have been trying to backup my text messages so that they are in a readable format on my computer so that I can read them or print them. I have a number of pictures that have been sent and some important conversations I need to save; however, they are taking up a lot of memory on my phone and I would like to delete them, but still have access to them on the computer. I downloaded a free program called Appandora, but it locked up every time it started to save the second text message thread. The one that it did save was in a .txt file and was very difficult to read. I do understand that the texts are backed up when the phone is backed up, but I want them in a readable accessible file.