I have files that do not ask for a save if just opened and closed. But they DO ask for a save if I zoom the view, or change the view angle, but do NOTHING else. I have other files (often drawings) which ask for a save every single time they are opened, despite NO editing being done to any part or assembly that is a component of them. If they ARE saved, they will again ask for a save the next time they are opened, even if saved, closed, and re-opened. You mentioned that the program will demand to save a file done in an earlier version if it is opened and nothing is done to it. Apparently that is "intended behavior". These things appear to be completely unacceptable behavior for professional use. The thread you closed was, unfortunately, directly correct and right on the mark as far as unwanted save activity. I know that you do not want to hear that, and may even be angered by bringing it up. But it must be done. This really is basic to file integrity. One MUST be able to know when a file has or has not been changed in some way as to the geometry. Now, it is a question, one that cannot be answered. Too many things which do not affect actual geometry will apparently trigger a save. We used Pro-E at a prior employer, and that program NEVER did such a thing, even after updates. I have used Solidworks, and THAT program never did these things. Actually ALIBRE used to never do these things. It is something that has appeared more recently. Unfortunately, I do not have an exact date of the change, but to the best of my recollection, it was somewhere in the time just before or just after the "lost years" of 3DSystems. If the program did not do that before, then it should be able to not do them now.