There is a fee if you want to upgrade your Cardiris application to a newer version compatible with Windows 7 on 64-bit architecture. You can find the latest version on the official web page, but I suggest you to contact the developer before purchasing the application.
Also, you can try to download and install Windows XP Mode and install Cardiris in this environment. Windows XP Mode makes it easy to install and run many applications compatible with Windows XP directly on a Windows 7 computer.