Bogdan, I'm not at the office currently, but as far as I remember, you have to load the Finale file with the Special Edition Human Playback Preferences one time to make them available.
Mike, our AU components are 32-bit and 64-bit compatible. I have seen that you are using old Vienna Instruments and Vienna Ensemble versions with OS 10.9. Installing the latest Vienna Instruments/Vienna Ensemble version should solve your problem.
http://www.vsl.co.at/en/68/428/514/210.htm
Best regards,
Andi
Vienna Symphonic Library