Ananplan 3.4 excel add-in value name

Hi, we have just upgraded from Office 2010 to O365, and the excel add-in is now restricted by GPO policy - can anyone tell me a) Does the add-in need to be reinstalled ? and b) What the add-in name value is, so that it can be added to the GPO list of allowed add-ins. E.G. for the Adobe Acrobat PDF addin the value name is "PDFMOutlook.PDFMOutlook" - I need the similar value name for the Anaplan excel add-in. 


Many thanks in advance.