Thanks for the above posts everyone as I have finally managed to downgrade from 133 to 123 using the utility software and the instructions above. The only problem I had was, a couple of hours trying to get the right utility version I discovered on YouTube that you have to have the camera in PHOTO mode for it to activate the downgrade. Hope someone spots this post that may be having the same problem as I had. I was in movie mode and couldn't figure out why it wasn't working. Have a look at this video that sorted me out. https://youtu.be/DY-Mf08OInE