Similar situation. It was previously working. Macbook Pro 15" OS Sierra 10.12.3 XMC-1 has a static IP address and works fine from a windows machine. This is both Dirac LE lite as well as the Full version. This is using build 6848 of the Dirac Live full version for mac.
Panasonic - 65" ZT60 Plasma Calibrated by Chad B Emotiva - XMC-1 (actively tweaking) Emotiva - XPA-5 Gen2 Roku 3, Xbox One, PS3, Tivo Roamio B&W - CM10 S2, CMC2 S2, CM5 S1 SVS SB13-Ultra GIK Room Acoustic Treatments (Planned Upgrade)
Sonos: Play 5 Kitchen Play 1 Bathroom, and Workshop Emotiva - UMC-200 (Backup duty at Mom's Home Theater)