Some of you have experienced that once you have installed the Hamachi LAN network you suddenly cant play SGW (or other games) in normal internet instead of LAN.

When you install Hamachi it becomes a new network in your list so automaticly your computer could "want" to use that connection as its primary.
Ensure you deactivate your Hamachi conection once you finished playing on LAN. To do so, open your conection page, select properties on your Hamachi icon and deactivate.
That should resolve the prooblem that some of you are having. Please contact me if you are still having problems.