How To Disable Go SMS Pro Auto Correct?

[Viking1204]

I've gone to Settings, Language & Keyboard and can't find anywhere there to turn it off. I don't mind it suggesting words and then me selecting them but it drives me nuts when I type a word and hit space and it automatically changes the words. Please, someone tell me how to make this stop, I'm ready to ditch Go SMS Pro and try another messaging App at this point.