Replacing Slides via File
If you don't wish to or cannot replace your slideshow images using the transform plugin, you can also copy jpg files to the configured location (Ask your System Administrator), with a naming convention 1.jpg,2.jpg,3.jpg...
This is a harder task as each image supplied must already be the same as the configured size for the homepage slider in order to display correctly, use of the transform plugin allows you to easily crop and scale the image to fit exactly.