iMovie 10.0.8 does not open older iMovie .rcproject files
I have tried to "Update Projects and Events" and also tried to "Import Media", but remain unable to open projects in iMovie 10.0.8 with file extension .rcproject that were created with iMovie 9.0 and identified as "iMovie Project" files in the Finder. They are dimmed whenever I try to use iMovie 10.0.8 to open them.
In the process of trying to move back to iMovie 9.0, I can open iMovie 9.0 and while the projects appear on the list of Projects, they are not apparently incomplete and "Source clip is missing" message appears where the viewing screen should show the video. They will not play in 9.0, and therefore no editing is possible.
Did I read that once "converted" to iMovie 10.0.8 that files would no longer be recognizable by the older iMovie?
I have numerous projects created with iMovie 9 that seem to be somewhere in limbo:
Neither iMovie 9.0 nor 10.0.8 will open them.
iMac, OS X Yosemite (10.10.3), 21.5-inch, Late 2009