There are several settings files, one fore each joint and a general settings for g-code and machine settings.
On a Windows 8 machine, they are saved under \Users\yourusername\AppData\Local\JointCAM\1.0\Config.
On the new machine, go the the Configuration page, and click the Settings Files button, and it will take you to the Config folder. Open that up, then close JointCAM, then copy the old files into the Config folder. When you restart JointCAM, you should be all set up.