Even if it works, the domain is still doubling. I see this in your CSS: //example.club//example.club/vault/resources/fonts/font-awesome/fontawesome-webfont.eot
So if it stops working again, it is most likely due to this.
To change the URL term you have to change the setting "Filename of the Wiki PHP file"
Then you have to update the .htaccess rules for the wiki and change the wiki_index stuff to the new name. I think there is another block that needs to be activated, but the .htaccess comments should explain this.
I am leaving this open for now, since VaultWiki has the same fault as DBSEO of adding the domain before // in a few places if // is used to start the base URL (your base URL isn't like this, so you are not affected by the VaultWiki fault).