Don't worry, you can install it on mulitple computers to play LAN.

hmm, yes, but it also says that you can only use it on a network if you have enough licenses. It says, the number of users shall not be more than the number of licenses accquired. So I think the EULA doesn't allow to play LAN with one copy, even though I remember reading some Stardock post or article which said they do allow that, but they think it's up to every publisher/developer to decide on their own if they agree with that.

What am I supposed to do if me and my roommate both have legally bought copies of the game (mine through digital distribution his from the store) and every time we try and play a local lan game or ICO game it always says that the game files differ from the host. We're tried re-installing both copies. neither of us have any mods installed. Even after the 1.1 update that just came out with their so-called new network code we STILL get the same error.

This is so unbelievably retarded