Problem with macro created ribbon tab

I have for the last few years used macro created ribbon tabs to nest a list of macro controlled function for that workbook. The macro creates the menu bar on opening and remove the menu bar on closing. Code for open & close

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The changes to excel 2007 automatically added a tab to the ribbon instead of the tab like buttons at the bottom of the screen that it used to create

My problem is that one user (by whatever method - baffles me). Has two copies of this tab content in any open workbook of excel and it is interfering with other workbook functions. Even when excel itself is opened independently they are there.

I have tried many times running the Remove bar macro but no effect. On opening the workbook it gives a macro error on that "remove toolbar line". I have looked through the excel options menu to remove it manually and no luck. It effects no other PC on the network - just the boss's :-)

Any assistance in removing this greatly appreciated. Nigel

Did you search C drive for .xlb file?