Installed MOTU audio interface software - audio output has disappeared?

hi, does anyone know why after installing the software to run my MOTU 896HD audio interface i am no longer seeing the audio output in system settings?
i use this to output audio to the little mini jack output for headphones etc. now it is gone. how can i restore it?
thx in advance for any help!
-fj

edit: i should add that i mean the "line out" audio output. sorry for being unclear...

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