[Zope] The mysteries of Product icons ?????

I made an icon form my new product, Zope loaded it correctly. Then someone had the brilliant idea to change it. I can not figure out how to get Zope to load the new icon. I have deleted the product from Product Management at /Control_Panel / Products, rm the *.pyc files, bounced Zope, but it still hangs on to the old icon. Can anyone out there demystify this for me??? DR