So I've read here and there about people being unable to join the server because Steam's list isn't populating, and the server fails to show on their history or favorites. Before you throw a stick at staff, it's Steam's servers being a pain =P
So one of the last times, a couple of peeps and myself tried for a solution, and good news, it works whether your alt is on Lib or Nov (assuming that it also works if you're on Caza).
You open Wurm, and since you can't use the list as normal, instead click on the "Connect by IP" button on the bottom left.
In there, fill in the following values:
As long as the server's up, you'll be up and wurming as if nothing had happened.
[19:11:17] You stare into the darkness of the Abyss. You step into it and fall. You fall.. [00:25:05] You never thought that something could be this dark.. so.. vicious and hopeless.. [15:02:26] The pain! The horror! The horror! [19:11:28] You will henceforth be known as the Death Knight Mordraug [01:26:01] An aged diseased champion son of nogump is dead. R.I.P.