I developed a Pop-Up Calendar. The add-in works in the original Excel Spreadsheet file on the originating PC. Although I've tried to save it as both a macro enabled worksheet and macro enabled workbook, the spreadsheet copies to the second PC, but the add-in doesn't...and also doesn't even show up on the list of macros. I am loading the file on a thumb drive, then onto the second computer. What is the procedure to save and copy Add-ins? Also I developed the Calendar Add-in on Windows 8.1, and would like it to work on any PC with any operating system which I choose to load it on (currently trying to load it on a second PC with XP)...please help. Thanks
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