You've downloaded the app, but when you try to open it you get an error. Here's how to download the app and resolve the error:

1. Open your System Preferences.

2. Click "Security & Privacy."

3. Click "General"

4. Click the Lock icon in the bottom left-hand corner.

5. Fill in your username and password.

6. Press OK.

7. Click "App Store and identified developers"

8. Re-open the Prime Edits app.