MIxbus 32C didn't show anything for Waves either. It required me to "pretend" I updated the scan paths. Then asked if I wanted to scan. I replied yes. Closed Mixbus and reopened. All was fine.
So far Studio One Pro, CbB, Reaper, ProTools, Cubase and Digital Performer also now scanned and recognized V12, with nothing more than opening them.
Yet to go/scan on PC DAWs: Reason 11, Samplitude, Acid Pro and MIxcraft.
Then the editors: Wavelab and Soundforge.
Then I'll complete the Mac installed DAWs.