I think you can save over the original but you might have to reapply to selected parts. A few years ago we had a problem when someone sent us a file with hardware selected that we either had a different pattern associated or none at all and if we did a material change of any kind they would lose "their" patterns. It was a mess for a couple of jobs so you can understand why they put this practice in place. Forrest
I do know that I tried to save a file that I had edited, and the changes didn't take. I tried it again yesterday, and the changes did take...
I'll take a closer look when I have some time.