The reason why the software doesn't appear again in Windows 10 is because of compatibility issues. Most likely, the Greeting Card Deluxe applications were not compatible with Windows 10, and because of that, the OS didn't include it in the new installation. However, if you graded, the old files and folders are found in C:\Windows.OLD
Users who upgraded to Windows 10, are allowed to go back to the old OS for a month only, then Windows deletes the recovery files automatically.
The new version is compatible with Windows 10. You can get additional information through the following link: http://www.novadevelopment.com/software/greeting-card-factory-deluxe-502515
