If you save it as an add-in XLAM format then install it as an add-in the ribbon tab will always show, however there is no need to do that. It will work with any workbooks that have the correct format. Open the workbook. Click the Reset button and add the workbooks from the dialog.
The attached corrects for donors not in the donors' list.
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Graham Mayor - MS MVP (Word) (2002-2019)
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