If you don't have Time Machine running you can purchase iMove from the App Store for $15.00. Select the /Applications folder and you'll have iMovie back. You'll be exited from Time Machine and OS X will ask you where you want to restore iMovie at on your machine.Right click on iMovie and select Restore 'iMovie.app' to.You'll see it appear in the Finder window. While viewing the contents of the /Applications folder in Time Machine, Scroll backwards in time until a point before you deleted iMovie.Once Time Machine loads press Cmd-Shift-G to open the Go to the folder: dialog box and enter /Applications in the dialog and press the Go button.Click on the Time Machine icon in the menu bar and select Enter Time Machine from the menu.If you have Time Machine running you can retrieve it from a back up.
