Check if you have an old version installed. Erase that from your computer. Than use the AppStore App and click below on your account. Then look for the Imovie icon (purchase). It will show you the cloud sign next to it.
Check if you have an old version installed. Erase that from your computer. Than use the AppStore App and click below on your account. Then look for the Imovie icon (purchase). It will show you the cloud sign next to it.