I noticed on start-up, Blender 2.78c system console emits these errors when using the filmic OCIO file:
Color management: Using C:\filmic-blender-master\config.ocio as a configuration file
Color management: display “sRGB” used by scene not found, setting to default (“sRGB / BT.709”).
Color management: scene view “Default” not found, setting default “sRGB EOTF”.
Color management: sequencer colorspace “sRGB” not found, will use default instead.
However, I don’t know how to determine the source of these errors.
It just appears to me that the filmic color management does not work. Reinstalling Blender did not help.