Well, that helped a lot, thanks!
So I got it to work using that IP address, and the test patches you sent me. WOO!
Then found a tutorial about manually configuring IP addresses, as that area of the GUI wasn't giving me much like. I edited my /etc/network/interfaces file and managed to set the static address of 10.1.1.101. And got it all to work again. WOO!
But... small issue is that I think I need to add a line to the interfaces file, as the pi doesn't automatically connect to the network now. It just keeps scanning up and doesn't actually settle on a network. When I select my network from the options and type in the password again, it works fine. The wpa_supplicant.conf file still has the network name and password in it, which makes me think its the interfaces file instead.
And its PD 0.46.2. I'm no longer sure if this means its extended or vanilla... brain fried...
Will post it below: