Just discovered something interesting on superuser.com if you want to maximize the Unity game (PCEA) window. Fire up the game and take it out of fullscreen if you have that mode switched on.
Open your task manager and on the applications tab, right click on the WGT Golf task and select maximize from the drop down menu and voila! You are now maximized.
Open your task manager and on the processes tab under apps, click the arrow to the left of golf.exe, or double click golf.exe, then right click on WGT Golf and select maximize from the drop down menu and viola! You are now maximized.
If you double click the Unity game title bar when maximized it should restore the window back to its previous size. Doing this before exiting the game should also prevent the resolution selection screen...
...from showing when you next launch the game.
Thanks to OlyDLG on superuser.com for that.