You do have to authorize the POD X3 via internet using Line 6 Monkey. This creates a local file on that particular machine which is necessarily for the X3 to function as a "dongle" for POD Farm Plug-In during instantiation with a host DAW. The document you found is a workaround method for users who feel strongly about transferring asset files from an Online machine to an Offline machine.

However, one important requirement for our POD X3 USB devices is that it requires a true USB 2.0 port connection, whereas our other devices do not. If you're connecting the X3 to a USB port that isn't a known-good USB 2.0 port, the software will not recognize your X3 correctly, thus indicating to you that no valid hardware device is available.