Login to Bongo4U Admin Mode.
Hover over the "Products..." option on the Page menu, hover over the Category that contains the product to be edited, and click on the name of the product. If you don't have a "Products..." option on your Page menu, then refer to help entry "How do I Enable my Site for Products".
You will see the Edit Products form.
Change any of the fields as desired.
Click any of the "?" help links beside each field for details or suggestions.
Click the [Save Changes] button to store your revisions.
Additional Info: Read the "How do I put a Product on Promotion" entry.