FCPX has lost track of motion templates
I moved an FCPX library to an external drive as it was too big for the startup drive. I had consolidated all media (including Motion templates) but now the library can't find the templates I created. They don't show up in "installed titles." They are still on the same hard drive as the Library.
How can I get FCP to reconnect to these title templates?
MacBook Pro, macOS High Sierra (10.13.1), The round Mac Pro 2014