I am going to ask what sounds like a dumb question now. Is Start11 actually running?
Easy way to tell, right click on the menu, does the menu have configure Start11 on it.
I suspect whats going on here is Start11 is not starting on your PC, perhaps due to some AV app getting confused or optimizing tool disabling the service to 'speed up your PC'
The other option is Start11 is set to not provide the menu, you can check this from the Start11 settings window.
My usual recommendation is uninstall, REBOOT and then reinstall but you say you have done this which points to one of the above being the issue.
If you know how you use Taskmanager you could check if under details you can see Start11Srv and Start11_64.exe running.