If you are an existing GSPro user, you will need to convert your license to a GolfTrak license type to access the ability to connect to GolfTrak.
Convert your license via the GSPro website here: https://gsprogolf.com/convert.html
After converting, download the latest stable version of GSPro to ensure you have the correct version. Find out how to do this here.
Clear your GSPro Connect settings. Find out how to do this here.