Every time I change farms/fields on my Pro 600 in the combine it loses the operator.  I have to go back into the toolbox to select the operator.  If I don't, it defaults to a metric setting and won't show yield data on the Run 1 screen.  The only thing different than last year that I can think of is that I had two operators listed under the same name and deleted one of them back before harvest.  I haven't tried, but I suppose there is a way to make the remaining operator the default.  I thought it was the default, but apparently not.