Named as the program name?
OK .. Refer to this guide (keep bookmark) It's important to be careful and be sure of what you are deleting, as you can disable Windows by deleting incorrect things!
http://mintywhite.com...the-windows-registry/
Open Registry. Edit .. Find .. Entries .. leave all boxes ticked and search for that program name in box (exactly as it was named in Program Files)
It may take a while. You need to delete whole 'keys' in the name of that Program .. I expect it WILL find some.
Make very sure you are only deleting keys by that Program name. The keys expand into tree entries like Windows Explorer. If you delete top level, it will take out others inside it.
Do a search first, and come back and state if it finds entries by that name .. before deleting anything. You can always start the search again over.