How to activate sidebar in Directory plugin and its default theme?

I want to put a wp chat plugin (quick chat) on the right side of the main container area. I'm using your Directory plugin.
http://www.rehabfinder.info

The chat can be used as a widget, but your theme that comes with Directory plugin has only 4 footer widgets. I'd like to enable sidebar, so I can have quick-chat and some other plugins displayed o nthe right side of the main container.

How do I enable sidebar and sidebar widgets?

Thanks