@vickygeek: In Catch Everest Free theme there is not image slider where you have just add single image or multiple images. In Catch Everest Pro theme, there is option to upload the image, through Image Slier. Just upload only 1 image and there won’t be slider. See theme instruction for more details http://catchthemes.com/theme-instructions/catch-everest-pro/
In Catch Everest Free theme, there is Featured Post Slider. Yes, you can add only one post as Featured Post Slider, so it will only have one image.
Follow the instruction below to add the Featured Post Slider.
1. First create the Post and don’t forget to add in the Featured Image in the post as this image is used in the slider. To add featured image see this http://en.support.wordpress.com/featured-images/#setting-a-featured-image
2. Then get the ID of the post. When you edit your post or write a post, you will see the id in your browser address bar. You can also find the Post is in All Posts section. But if you cannot find it then you can use this plugin to view it http://wordpress.org/extend/plugins/catch-ids/
3. Then go to “Appearance => Theme Options => Featured Post Slider”. Add in the post id.
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