Autosave is driving me bonkers - every time I repurpose a base document it automatically overwrites it unless I remember to turn off Autosave (which seems to default to On) before I get started. Yes I know I can step back through multiple versions but that's a real pain and is not good for my hypertension. Please Microsoft - give us the ability to disable Autosave at system level. Or if you can't do that, at least have it defaulting to Off not On. And please do this now!