If you are on an iPhone...

Delete the app off of your phone.
Connect to iTunes.
On iTunes, go to the App section.
Find the app and move it back to the iPhone.
Sync and disable auto update.

When updates are available for other apps, just be sure you skip over this app.

I had to do this to roll back an app because I had auto update enabled. Once I did this procedure, I have back the app that I loved and can read. As the new app was too colorful for my eyes. It was a word guessing game.

KOT