Is there a version of Fireworks still installed? And you can launch it from
the start->Programs-> menu?

Go to dw preferences under the Edit menu.
click the tab for File Types and Editors.
there is a line at the upper part for Fireworks.

use the browse button to the right of that line to find and select the
fireworks app.
--
Alan
Adobe Community Expert, dreamweaver

http://www.adobe.com/communities/experts/