Photos for Slider not Uploading

Hello, I have been using the free version of Everest, and I really like it. However, I needed to take the links off my homepage sliders, so I upgraded to have the featured image slider. When I switched the theme, all my old slides stopped working, and I now have default slides. However, when I go to Theme Options > Featured Image Slider Options and I choose my images, they don't show up. I tried selecting the images from my media library, since they were already sized correctly, but when I inserted them into the post, nothing happens. I tried uploading from my computer, and still nothing. Can you please help me, as my site is live with the sample slides on it. http://kendallwells.com