I have a very similar problem (in the evaluation copy).
My font was called something different to start with (“TH1.ttf”); I made the changes I wanted to, saved & installed etc. but the font name that appears in Word’s Formatting toolbar is blank until I select it (the blank name that is) and then the correct font name appears!
I read your previous post, tried re-naming via the ‘Tools’ > ‘Auto-Naming’ feature (saved & installed etc.) but to no avail … the font name is still .