You can upload images to your site using this simple image handler.
Main Images: This folder would contain general images you use in one or more places around your site.
The other destinations are Article Images, News Images and News Cat Images,
each of which are specifically for Articles, News Items and News Category images.

Before using the browse button to navigate to the required image on your PC, click the category you want to load it to first and then click the "Upload Image" button.
Once you have selected one of the pre-defined folders, you will have options to upload, view an image or delete it.