To update the Garmin express application you can go to garmin.com/express or follow the below-given steps:
1. To begin, launch Garmin Express.
2. Select Settings from the drop-down menu
3. Go to the About page.
4. Select Express and click Check for Updates.
5. If prompted, select Install Now.
For Mac:
1. To begin, launch Garmin Express.
2. In the Apple menu bar, select Garmin Express.
3. Select About Garmin Express from the drop-down menu.
4. Select Express and click Check for Updates.