Keith,
Thanks for a quite useful plugin. I installed it and purchased the standalone MakeOrthoView plugin from smustard. In that version, the generate_ortho_views function is not called by JF.generate_ortho_views anymore but by JF::MakeOrthoViews.generate_ortho_views. Just a find/replace in your Comp2LayerScene.rb works well.
Cheers,
Phil