Image editor - changing

:confused;

I had a 30 -day trial version of Fireworks 8 that expired. When I click on the
"edit in Fireworks" icon in the Dreamweaver properties panel it tries to open
this and asks me to activate it. So I uninstalled it. Now I have made sure that
Edit->Preferences->File types/ editors points to my older Fireworks MX 2004
installation. Great. But nevertheless, when I click the "edit in Fireworks"
button, it still tries to run the now uninstalled Fireworks 8 and errors.

How do I change this?