Audirvana Plus Upgrade Problem

Just upgraded from version 1.6 to 2.0 and Airplay is not working now. Plays fine via a USB connection to the DAC or on the laptop speakers. What should I look for to troubleshoot this problem? Everything worked fine with version 1.6. I am using a MacBook Air to stream to an Apple TV into a Cambridge Audio DacMagic 100 via Toslink.
Try shutting everything down, let it sit for a minute, and then turn it all back on.

If that doesn't work, make sure all the settings and/or password carried over from the upgrade. You may have to reconfigure the software.
Problem solved. Under "Preferred", "Audio Systems"; there is a checkbox to turn Airplay on, under this it is now necessary to select a specific Airplay device. This was the checkbox I missed. I believe this feature is new in v2.0?