I'm creating different libraries for each of my projects. When I attempt to open a new library via File > Open Library, it has both the old library open and the new one open.
I want to close the old one so I don't accidentally create projects within the old library.
File > Close Library is disabled. If I try to close iMovie and re-open it, it remembers the last library that was opened.
How do I open just a new iMovie Library?