Step One: Click on the ball you wish to edit on the Ball-By-Ball tab. 

Step Two: Select the edit button. This will then bring up the ball options (going from a light grey to coloured panels).

Step Three: Change the ball to the correct one. 

This will then bring up a prompt asking if you would like to make corrections throughout the          innings up until and including that ball.

Auto Correct: The system will automatically change the rest of the innings from this ball forward. The changes will be highlighted in red.

Continue Without Auto Correct: Allowing you to make the change to the ball and not the rest of the innings.

Make your change and continue scoring the game.