It seems like, currently it´s not supported. I first thought, maybe it´s just made from procedural meshes (and they use a lot of splines in this video to form all the shapes, so that seems to be the case), which are not supported, and you could drop the water material on a regular mesh. but after loading the plugin, that Wave asset seems to be it´s very own thing, not just a regular material.
So i guess, you would have to build your Ocean water material for the Pathtracer from scratch 