Unless otherwise stated, to add/edit/remove the top sliding banners on your homepage, you can browse to:
Extensions > Apps/Modules > Camera Slider > Existing Modules > (there should only be 1 item here), click on Edit.
You will then see General Settings on the left, as well as Slide 1, Slide 2 etc. depending on how many slides you currently have now.
Do not edit the values in the General Settings page.
Click into Slide 1/2/3/4, to change the Slide banner.
Click on the image, then on the pencil icon to change image, or the trash bin icon to remove the banner.
Upload your own banner and select it.
Insert your link into the Link field if you want to link the banner to other pages.
Click on Save, and it's done!