Wholegrain Dynpeq

[Pindos]

Hi,
I'm running reaper's last Intel version on an M1 Mac mini (Monterey). Everything great. But I have one plugin, Quartet from Wholegrain, which is according to the developer working via Rosetta, but crashes Reaper immediately when loading. I have plugins from over 20 manufacturers, they all work without such issues.

The developer says perhaps reaper does not support AU V2 anymore - which seems unlikely to me but I have not been able to find any info.
Does anyone have an idea?

Best
Pindos