I am using artcam 2017. I found a 3d relief scan of a 1911 pistol grip. I need to make the other side where a half moon indention is for the safety. The thing I need to do is mirror the image but get rid of the half moon indentation. How do I edit this image? There are no vectors to select. Any help would be greatful. I am sure this is the same for earlier versions of artcam so it doesnt have to be done only in 2017 version.