Since Fireworks' development was stopped in May 2013, and it is no more supported by Adobe, Fireworks is one of those applications of which the GUI will not scale correctly on a retina high resolution screen in Windows.
You can use these steps to increase the GUI size:
Wow - thanks - though I have to say that's way over my head. I don't know how to even "tell windows to prefer an external manifest file."
Is the other solution deleting the program and reinstalling it?
No, Fireworks just does not support a retina screen "out of the box" - you may want to ask a friend or family member who feels more comfortable with the technical side of Windows to fix it for you.
And this trick might not work for Fireworks - I never tried it myself. Having said that, there is no reason why it would not work - works for all the others, so why not FW?
I really appreciate your response! Thanks again!