Howdy Erwin,
Please forgive me if I'm being redundant because I misunderstand the problem here
The Harmony font (harmony_.ttf) should install into the \Windows\fonts subdirectory. I just looked on my system (where Player and Composer are both working fine) and the only place that the harmony_.ttf file is installed is in the \windows\fonts subdirectory.
ttfn,
Sherry