Going through the steps in your link, it appears when trying to change it to bridge adapter there will be no option to pick the connection type, as well as an error at the bottom stating "Invalid Settings Detected" indicating that no bridge adapter is currently selected. I think this is because the first step:
"1. Enter into MEmuHyperv\ folder and run NetFltInstall.exe with admin privileges. This step is to install the driver of network bridge, which is not installed by default. For few Windows 10 system, this driver might not be able to be installed properly (known issue)."
Indeed does not work on my computer. This question is not directly meant for you, but does anyone know of a way around this issue so that the driver installs properly? I notice once running it, it will open and close rather quickly with no prompts of completion. Thank you.