In Windows 8, 8.1 and 10, users not designated the administrator can not access or write to the registry. Right click on the program icon after installation. Select Properties > Compatibility. Then check Run this program in compatibility mode for Windows XP (Service Pack 3), and place a check mark on Run as an administrator.
Press OK to close.
Now double click on the program icon to start. Follow the instruction to register the program using your email address and the System ID given to you from the first page of the program. Once successfully registered, the program will not ask you to register again.