imovie 10.0.4 duplicating a project.

Imovie 10.0.4, mavericks 10.9.4. I need to duplicate a project. Apparently, older versions of iMovie had such a command under the File menu. 10.0.4 does not (as well as missing other good old things).

My workaround was

1. select all of old project (command a)

2. command c

3. create new project

4. command v

Seems obvious and worked. What have I done right?