Sonic SE3 Loads Only One Media Bay Instrument

I finally upgraded to Cubase 10 from Cubase 5.5. All went well, except for Halion Sonic SE3…

When I open an Instrument Track of Sonic SE3, it loads and can play the instrument “First Contact”. So far so good, and here’s a picture of it attached.

But when I try to open any other instrument, it opens another instance of the Sonic SE3 window, and nothing that’s in the Media Bay shows up in the Sonic SE3 instrument. Behold:

Can anyone get me out of this loop of despair? I have reinstalled and repaired several times…just cannot get Sonic to load anything other than “First Contact”.

I never did figure this one out, but I started fresh on a different PC and all went well. Back in the saddle again.