These are good questions which you need to ask to whoever wrote that plugin.
i tried, but i cant sign up for their forums 
I installed the plugin for testing purpose and I didn’t like it at all.
The chat software it self is nice stuff.
Build by https://blueimp.net/ajax/
I daunt like to have advertising stuff integrated. And there is add-sense in this Plugin.
I think this is not the finest way of making money.
If you want to test it, you need to install the chat client too.
For me it look like you just installed the plugin.
Go to the plugin directory. There must be a directory chat. Go in there and read the readme file.
After you fallow the instillation process of the chat software.
You will be able to chat and the Page will show up.
You will need to enter your mysql connection information.
I don’t know, but I think it is the best not to use the wordpress database for this.
Actually it is not a plugin and has nothing to do with wordpress it self.
The chat has its own connection to the db.
