Add-ons screen not listing any add-ons

I have added a job category and set the slug line in settings. when i go to the add-ons menu there are no add-ons listed.

am i supposed to add the add-ons from somewhere? the description says there should be add-ons in there or at least some text to read and i am not seeing anything except the title ‘WP Job Manager Add-ons’ and my admin UI.

any ideas why this might be happening?

http://wordpress.org/plugins/wp-job-manager/