A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
That worked! So relieved. Have used MS office since before Windows (MS-DOS) and have a 30 year old habit of saving documents with specific name extensions (-1, -2, a, b, etc.) to easily go back to previous versions. I work on an international standards committee in a regulated industry and it's imperative to have saved various versions as one works toward a final. This autosave feature was driving me crazy.