I recently bought a new iMac (to replace my 10-year old one), and installed MS Office for Mac 2019. My old iMac had Office for Mac 2008. There have been a lot of changes in the last 11 years, and I am having enough trouble with learning where everything is on the new Excel version, but I will eventually figure it out (I think). However, what I can't figure out is how to open all my old Excel files (which were moved over as Excel 2008 files) so that the don't open in Excel 2019 and require reformatting (column widths, etc.) every time. Is there not a way in Preferences (or somewhere) to instruct Excel to always open these files in the original formatting?