Hi there, So I went ahead and installed Mavericks today and also upgraded to iMovie 10.0. When I first opened the new iMovie it prompted me to upgrade my iMovie library which it started to do...but then after 2 hours iMovie froze and I had to force quit. Upon opening again though it didn't prompt me to upgrade my library and instead I have an empty library. I have tried to delete the new version and reinstall but this has not worked. I also deleted plist files to no avail. The events and projects are in my movies folder in finder but how to get the new iMovie to act as if it is the first time I am opening it again so that it will import my library and events? Any help would be much appreciated!!! Thanks!