Adobe published valid product keys for a range of Macromedia products on Windows and Macintosh when they disabled the activation servers on December 15th, 2012.
They are all accessible in an archive of Adobe’s site here: https://web.archive.org/web/20210314181449/https://helpx.adobe.com/x-productkb/policy-pricing/macromedia-legacy-activation-error.html
It has product keys for Captivate 1.0, Contribute 2.0, Contribute 3.0, FlashPaper 2.0, Director MX 2004, Dreamweaver MX 2004, Fireworks MX 2004, Flash MX 2004, Freehand MX, and Macromedia Studio MX 2004. Setting Windows’s Compatibility Mode to ‘Windows XP (Service Pack 2)’ seems to be the sweet spot if using a contemporary version of Windows.