I have DraftSight Standard and have used it for about 8 years and Acad much longer. Presently using 2019SP3. Today, all of a sudden, I cannot mirror objects properly, or trim lines at all. It is very frustrating. Mirror revolves the object 90° and stretches it. Trim just won't work. I can pick lines but nothing happens. Tried rebuild, reboot, nothing resets it.