If you have a compatible phone, you can use the TomTom MySports mobile app to update the golf courses that are nearby within a range of 500 metres.
See also: Is the MySports app compatible with my mobile device ?
Each time you connect your watch to your computer, MySports Connect downloads and installs the latest changes to your recently played golf courses.
If you need to update all golf courses globally, for example when you plan to travel, expand SETTINGS in MySports Connect. Select the GOLF COURSES tab and click GET NEW MAPS.
Note that a global update may take about an hour to complete.