The interesting thing is that I was working on six projects in total. Three are blank, and three retained all editing changes with the updated clips. 7toX is up to date at 1.0.12. When I first translated from 7 I still had an older version. The music track opened in X, but my voice over clips were black. Updating resolved that problem.
Now I see what looks like a project in the Project Library only it’s blank. Opening it in the Timeline shows nothing. No place holder, nothing, as if it were a new project. Only the name remains. I have removed those project files and replaced them with those that retained the clips.
Do I understand correctly that if I open the FCP 7 project now, the FCP X projects will go offline?
Moving forward, I will duplicate the remaining FCP X projects before replacing the old footage with the new.