I have a current Office 365 license. I ran into a problem trying to open some old Excel files from a project I did in 1999 and 2000. These workbooks contained s

I have a current Office 365 license. I ran into a problem trying to open some old Excel files from a project I did in 1999 and 2000. These workbooks contained some valid VBA modules I had written. Excel's security model would not let me open the files, nor was I able to overide even though I knew they were fine. Finally, I opened them in Libre Office and saved in the current format. I have migrated the vast majority of my computational work to use R with RStudio. In a Rmarkdown document I can embed R and Pyhon code and generate plots. These documents play well with version control.