Here are the settings on the settings page, I don't see the network setting:
I'm running 126.96.36.199 (the latest) on a C-7 and it's here, which is missing in your picture:
Same...I'm on C7, the .138 release:
C4 if it makes a difference
Doesn't appear on a C3 either.
Does appear on a C5.
Only supported on C5 and above.