No need for the Muse workaround, try the options below, if the first option doesn't work, the second should. Tested on Windows 10 and Windows 11.
1) Launch the Creative Cloud app
2) From your profile icon (top right) click sign out
3) Then, Select file => Exit Creative Cloud (top left) to exit the Creative Cloud app
4) Now launch Fireworks, you will be prompted to login with your Adobe sign in details, do so
5) If you see a 'license this software' button click it, that should do the job.
*If the above does not work try this:
1) Uninstall Fireworks from your machine
2) Rename the following folder: C:\Program Files (x86)\Common Files\Adobe\OOBE to OOBE_BK
3) Download an offline Fireworks installer from here (these are official Adobe installers), be sure to visit this page first and sign in with your Adobe login to set an Adobe cookie, otherwise the download will not work.
4) Now install Fireworks with the offline installer you downloaded
5) Make sure you turn off automatic updates in the Creative Cloud app (in preferences=>apps) afterwards, otherwise it will update Fireworks and you may get the same issue again.
6) See if Fireworks will now launch, if presented with a 'license this software' button click it.
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