How to reinstall/ download Fireworks CS3?

I had paid for Fireworks CS3 some years ago and recently after a hard drive failed I lost the application. I need to get Fireworks CS3 back.

To further complicate matters, when I try and sign on with my old Adobe account, the account that I bought Fireworks CS3 with, I sign in just fine however immediately I am prompted to change my password via a link sent to the email address that I had registered with at the time of purchasing Fireworks CS3. That email address is no longer valid.

Please help, I'm unsure how to proceed from here.

Thank you.