I am having an issue with the "lock points" check box, being greyed out, and not allowing me to un-select it. Anyone have any pointers? For now I will just delete the feature and re-measure it. This is the second time recently that I have run into this. I verified that I am in teach mode, and that the feature is not locked with the red lock at the top left corner. This is a joystick measured feature, that I need to make an adjustment to a single point before running DCC, but am not able to.  I've attached two pictures showing the issue.