Now that MA Lighting have released grandMA3 1.6.3.7 which supports macOS 12 Monterey, we have also released Capture 2021.1.11 which reenables MA-Net3 plugins on macOS 12 Monterey.
The MA-Net3 plugin version option in Capture now has a "(disabled)" option. If loading an MA-Net3 plugin causes a crash, Capture will automatically set this so you can start Capture again without loading the problematic MA-Net3 plugin.