Got it! Even though I had downloaded and installed H9 Control v3.7.3, for some strange reason it kept opening up as v3.6.0. So I completely uninstalled v3.6.0 from my system and then reinstalled v3.7.3. Now it recognizes the TriceraChorus and loaded it in. Sure glad I finally got it, because it is a great chorus algorithm!
please ignore my original post now 🙂