There are several changes to the Start menu in Windows 10 1809 but this one I haven't seen mentioned.
In Windows 10 1803 if you click on the Start icon and type an application name, it'll pop up. Click on it and it launches.
But in Windows 10 1809 it's all different.
Yeah, it'll still pop up the application name but look at the other information that's presented.
You can directly click on one of the recent files that have been used with that application.