Either click on the Public Hubs button (the first one and double click a hub on the list to correct to that hub. Alternatively, ifyou already know a hub address that you would like to connect to, press CTRL+Q and type the address there. This is called quick connecting. Yo can also create a list of your favorite hubs by adding them to the favorite hubs list (Yellow Star). Some hubs might require you to set a specific description or something else, to even get into the hub, so adding a hub to Favorites makes that easier as well. Make sure you set your nickname and shared folders in the preferences before connecting to any hubs though. One more thing: Once you get into a hub and try to search for files, but nothing comes up, set your connection settings to Passive in Preferences and reconnect to the hub.