The preference files for various versions of iMovie are as follows:
⇒ iMovie 3 and iMovie 4 - "com.apple.iMovie3.plist"
⇒ iMovie HD 6 - "com.apple.iMovie.plist" (I think iMovie HD [version 5] also used this file)
⇒ iMovie '08 - "com.apple.iMovie7.plist"
⇒ iMovie '09 - "com.apple.iMovie8.plist"
⇒ iMovie '11 - "com.apple.iMovieApp.plist"
As you will note, it's all very confusing! This is mainly due to version numbers not matching the release name, or no number being allocated. For example, the iMovie '09 file is labelled with iMovie8 because the version number is 8 (the last release being 8.0.6). However, for iMovie '11 it's simply iMovieApp (with the latest version being 9.0.4).
It's difficult to see the logic with the naming protocols, but bear in mind, no harm will come if you delete the wrong file as iMovie (whatever version) will rebuild the .plist file with the default settings when next opened. You can then change settings if desired in the iMovie menu item "iMovie>Preferences".
John
Message was edited by: John Cogdell - added line for iMovie '08