I've been creating/using custom ribbon tabs in Excel 2010 for a while now. However I recently opened one of these workbooks in Excel 2013 and the custom tab has gone! When I copy the file back to 2010, the tab is back again!
Does Excel 2013 not support custom tabs?
Or do I need to make a change to the XML to make it compatible with 2013? And if so, then what exactly??
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