I did installed it, and got it there. There is a file StartPage.xaml in the same location you specify. Please recheck.
<Grid xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:vs="clr-namespace:Microsoft.VisualStudio.PlatformUI;assembly=Microsoft.VisualStudio.Shell.UI"
mc:Ignorable="d"
... ...
...
....
</TabItem>
</TabControl>
</Grid>
</Grid>
</Grid>
I dont know what is wrong in your case. :sigh: