Please follow these steps.
1- Please Go WordPress Dashboard --> Classify Options ---> Translate and Change text "Premium Advertisment" to "Featured Section"
2- Create any category from where you want to show ads here like create a category by name of Featured.
3- Come To Classify Options --> General -->
Premium Ads: Turn OFF
4- Featured Category: Put Category name here. And Press Save Settings.
So All Ads from this category will be shown on Premium Slider.