I have Excel 2019 (not 365). The Options+ COM Add-In messes up my clipboard, meaning every time I copy something (whether using my MX Master 3S button) or Ctrl C on my MX Keys, I get the error message "There's a problem with the clipboard, but you can still paste your content within this workbook." Literally EVERY time I try to copy something. The only way to make this go away is to disable the COM Add-In, but then I can't use the customized buttons on my mouse. So looks like some kind of patch needs to be done to the Excel COM Add-In unless there's something specifically wrong with my computer/version of Excel.