I have purchased the Orbit trackball but do not know how to upload the software so I can use the mouse. There is no indication how to do this on the web site.
You can download the software through the official website. The software is called TrackballWorks, and it's used to manage this device. You can configure every aspect and feature of the mouse with the help of it. Visit the website and download the software then you'll be able to manage the mouse and its features.