CDJ/XDJ Aggregator not showing up as an Audio Device output option

hi! Connecting CDJs to Rekordbox via laptop. Was using aggregator 104_2 forever, no issues. Suddendly not appearing as an output audio device option in Rekordbox preferences. Downloaded latest Aggregator 104_3. When I run the Aggregator it sees the two CDJ-2000NXS2, however when I go back into audio preferences, it is still not listed an an audio output device option.. help?