I struggled with all of the above solutions but created my own.
Windows stopped showing DB as an app in any of its lists. My solution is to get the app back in the startup apps list, by pasting the shortcut to the app in the following location:
C:\Users\*username*\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup
aka
%APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup
This adds DB to the startup list, then you can enable it.
Hope this helps anyone stuck with this issues. Windows is always trying to shoulder competition out.