Unity 5.4.1 here, copying Internal-Flare.shader to Resources folder inside Assets folder did not work. How do i overwrite the internal shaders with Unity 5.x?
Oh nevermind, there is a menu to chose which shader to use for internal shaders under Preferences->Graphics Settings
What debug menu?? EDIT: Holy cow!! I didnt know that menu!! Incase anyone wonders, you just right click on Inpsector title and chose debug there.