If you turn off Automatic Software Updates in Settings > System, new versions will not be downloaded to the handset automatically. In that case you have to Update Garmin GPS manually.
1. To access the system menus, hold down the top button for a long time.
2. Select Start/Stop from the Settings menu.
3. Select System from the drop-down option and scroll to the bottom.
4. You'll see the version (e.g., v4.60), the option to Install Now
5. To confirm, press choose.