After activating the plugin, go to the Talque main menu in the admin area and enter the ID of your event.
The talque plugin comes with a set of predefined pages to display the content from your event. To add them to your Wordpress site menu, start by going to Appearance -> Menus in the admin area and edit (or create) your menu.
Click on "Screen Options" on the top right and make sure that Talque is selected under Boxes. Then you will see Talque as a source for menu entries, below Pages and Posts. The Talque options are:
Select your desired menu entries and click on "Add to Menu".