Welcome to Justanswer.com, my name is Dustin.I'm sorry to hear about the issue you are having, I will do my best to help you resolve it.
To get started, I need to know what type of computer you are using, a Windows XP, Vista, Windows 7, Windows 8, Windows 10 or a Mac.If its a Mac, please check the OSX version as follows, Click the apple sign at the top left of your screen, then click about this mac. And then where it says version, send that to me as a reply.
Also, whats the full name brand and model of the gold device you are using, such as a Goldbuddy Voice + or Skycaddie SGX or Garmin Approach S4 ?
Allright, to install new course you need to connect your Gold buddy to your computer and then download and install the Course manager software from this page
And here is a video that will show you how to select the country / cities / or states you want to update courses for.
If you get stuck or run into any issues, let me know.
When satisfied and you have installed the new course you want, please remember to click and submit a 5 star rating, thank you.