IMovie crashed, lost project. How do you SAVE in iMovie? Where's the file?

Question

Just spent 4-5 hours building a complicated movie from a year's worth of footage. At some point, iMovie crashed. I think I lost all those hours of creative decision making, since I cannot see the file when I reopen iMovie.
There is no "open" command in the file menu. There is no "save" command in the file menu.
This would imply that Apple was autosaving for me to save me trouble. Hmm. I can save in almost every program I use, and revert, and save versions.
How do you save a project in iMovie? I don't see save in the file menu, as has been the steadfast tradition of Apple applications since I purchased my first Mac in 1984. What in the blazes have you done with SAVE? It is so basic.
Along the same line, where is the project file located on my hard drive? I would like to open it. Since I assume you have been autosaving to somewhere, could you please let me know where my file is saved.
<Edited by Host>

Answer 1

This just appeared to happen to me too.  I tried clicking on the file in Movies/iMovie Projects.  That didn't work.
Then, I made a copy of the  file in a safe place.  I noticed it was 2.2 MB, so something had to be in there.  Next, I started iMovie and clicked the Project Library arrow.  The project was listed there.  I opened it and got back most but not all of the work.  It lost a lot of my audio changes.  Here's the thing.  I worked until about midnight, and then left iMovie up and running til noon.  You would think it would have autosaved the changes by the time I came back.  I suggest making your own copy of the file now and then, just in case.