Only a few plugins showing in Elements


I am running a mac with Cubase Pro 9.5, Halion 6.5, and Wavelab Elements 9.5.

For some reason only a few of the apparently available plugins are showing… it shows all the wavelab specifics plugins, but none of the Steinberg VST3 plugins. I’m sure there’s a simple explanation, but I’m too stupid to see it. Could anyone please enlighten me?

Of the Wavelab specifics the only one I cannot see is MasterRig