Trillian - How do I bring back a channel window that I hide when using IRC?

[krackato]

I just started using Trillian a little bit. I've been using it for IRC and AIM mostly, but when I'm using IRC, and I join a channel, sometimes I want to hide the window by pressing the green button in the upper right hand corner. Unfortunetly, I have no idea how to bring back that channel short of disconnecting from the server, rejoining, and then rejoining the channel. It doesn't work if I just try to rejoin the channel, and I'm not sure where Trillian is 'hiding' this window. How do I bring back a channel window that I hide when using IRC?