Hi,
your sample shell look like mine.
I've figured out that there is an issue with the style which was exported from Theme Studio. When using the syncfusion Visual Style "Office2013" it work for my application to be able to navigate to the backstage. But when i use my customized one I'm not able to do that. (The button is there, but no reaction when click on it.)
I will figure out the issue next week.
Regards