Matt and I had some email correspondence. He suggested that I check HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Fonts to see if it was there.
It was. He guessed that the ID of the font conflicted with another installed font. I decided to delete all versions of the Eras font in my fonts folder and just install the eras demi ITC which is the most important version, for me, anyway. It works now! Dunno why that happened.