Unzip this file into your 2Moons folder and then run mini-launcher. This will get you updated so that you can connect to the 2Moons servers.
I take no credit for making the fix, this is the file posted on the official Gamehi forums. I am posting it here for 2 reasons: You have to have a gamehi account to download it from the official forums, and apparently there are still people who haven't gone to the Gamehi forums but instead are looking for answers here.