That is the bfgminer software ... you need to set up a driver first as well.

https://github.com/jstefanop/bfgminer/releases/tag/bfgminer-5.4.2-futurebit2-beta2

Ooops!

https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers