I have just finished marking all my students exams in the Speedgrader.. I was trying to get the average score with mean and median (as we used to be able to do in Blackboard)- so went intuitively for "grade curver"

BIG MISTAKE!! That has now converted all the scores to a grade average and I cannot over ride it. I am getting a message telling me this cannot be undone. All my students scores are much lower than their real score and I cannot seem to undo my mistake. 

Help please! 

Thanks

Rose