@brady-aiello For the old expansion board you do not need the DFU drivers, as it uses an FTDI or similar USB/Serial bridge. it should work out-of-the-box. If you installed drivers according to the instructions you cited, remove them.
See also the instructions here https://docs.pycom.io/chapter/gettingstarted/installation/firmwaretool.html#first in the expansion board 2 tab.
Some people had trouble with Windows and the V2.x expansion board, and there is a lot of discussion around it in the board, which sometimes is more confusing than helpful. As result of that, the instructions in the manual were updated.
b.t.w.: I prefer the V2 expansion board. Updating with the expansion board V3 or the pyxxxx board seems inconvenient, as it requires unplugging and replugging the board with a tight timing and reconfiguration of each OS.