Just a quick thought about "not a valid font file" --- I have had this message from my font manager a few times. I simply open the font in Type Light, check the font names (always they were fine), scroll through the glyph list (one time a "corrupt" looking unmapped glyph which I deleted), re-save the font file, and after that get no more "invalid" messages.
I think the save-file action corrects something in the bowels of the font.
Give it a try and see if it helps.
Last edited by GrannyGrump; 07-11-2016 at 10:03 PM.
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