Try this : Before clicking the Play button on the launcher, hold down your control key and keep it held down. Click the Play button and wait for a WGT Golf Configuration window to appear, then you can release your control key. If you have other windows open, the configuration window might appear behind them so look at your taskbar for the configuration window icon.
The configuration window gives you a range of resolution options, so choose one that will allow the WGT game window to fit comfortably on your monitor. Check the Windowed option also. Ignore the Input tab on the configuration window then hit Play!
⇩ EDIT : Cheers Fred. ; ) ⇩