MY APPS
The Self-Service portal has a few important items.
The first is "My Apps." This is where you load optional apps to your Mac or update installed apps. Clicking on the "My Apps" tab should show you a screen similar to this.
"Reinstall" - the app is already installed on your account.
"Update" - an optional update is available for that app. Click the button to run the update.
"Install" - you have the option of installing it by clicking the button.