the disks are damaged and no longer work on my computer for music maker 7 and need help getting my old serial back for the program that i purchased on 01/28/2005 the booklets are torn and faded and i can longer read the scratch off for the serial need help. https://gyazo.com/3dccd89f6f38a78af864a33fcc7dec92
Unfortunately you are out of luck with this. The very old versions had a different activation/registration system which may be why you do not see the serial number in your registered products list.
There is a free version of the latest Music Maker however your computer needs to be running Windows 8 or Windows 10 and be at or preferably above the minimum specification required. The free version is limited in functionality and available Soundpools and you will find the interface to be very different, and you may not be able to import the projects, from Music Maker 7. If you decide to go down this route and purchase the new version - get the Premium version all features as specified here are included.
@raziel-tempest My Music Maker 7 version back in the day did not have a serial. I unlocked it by putting the original CD into my computer's CD drive when I started the program for the first time. That's it.
If you find a way to make the disks readable again it should work if you have an old operating system like Windows 98 or XP.