thank you for purchasing Divengo theme. Sadly the WordPress importer does not import the slideshow content / images for the slider.
Solution: go to WordPress admin -> Appearance -> Allslider and upload some pictures. Then create a “pictureset” (below the upload), e.g. “Home” it’s like a category for the slideshow. Below the “Picturesets” is a list with all your uploaded images, here can you choose the “pictureset” for each of them.
Then, go to the page (editmode) you want to show a slideshow. Below the editor is a box with additional settings, open the “slideshow” tab. Here can you choose which slider you want to display and the “pictureset”, e.g. “Home”.