I am writing to report what I believe to be a bug in Athena. I am using Demeter 0.9.18 and windows 8.

To reproduce the behavior, open the attached project, and press the button to plot normalized marked groups in energy. One will observe that the fix edge step box is checked for the first group. Changing the edge step value for this group and pressing the button to replot the normalized data has no effect on the plot.

If there is any further information I can provide to help determine why this is happening, let me know.