Hiding the ribbon ONLY in my workbook, but not in other open workbooks?

I have VBA that hides my ribbon (seen below). My only problem is, when people open other workbooks, it hides their ribbon as long as the file that contains the code below is open. How do I make it so my hide ribbon code applies only to this workbook, even if one or more unrelated workbooks are open?

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Maybe

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I don't think you need the sheet activate event

Can you not use the StartFromScratch setting in rinbbonx? Then it would all be done automatically.