If you experience trouble connecting your driver to PulseIQ Software, the driver may not be installed properly or the connection could be lose. Download and install the proper drivers for your OS at https://ftdichip.com/drivers/vcp-drivers/. Also, check all connections and ensure everything is plugged in properly.
The lack of connection can also be attributed to an improper COM port. Verify the interface is set to USB Serial Port option. If this does not work, try power cycling the encoder.