Silvio,
When I referred to 2015 I meant the way it is displayed in File Explorer in Windows 10 in 2015. There doesn't seem to be a l2015 variable in the ribbonbar class. And I don't know if ribbonbars have changed in Windows since 2013. Windows 10 File Explorer looks very similar to FWH's ribbonbar set to the 2013 option (except for the color issue with the tabs).
James