Mtc Extendee Multiple E-mail Transport

I am trying to get the MTC Multiple Email Transport working, has anyone had any luck with it?

I tried the setup process detailed on their webpage (Installation - MTC Extendee Documentation)
but haven’t been able to get the menu that allows configuring transports to show up. I have the plugin enabled but I cannot get the menu they show in their video:

I tried e-mailing them about potential troubleshooting but have not heard anything back except for a suggestion that I follow the installation guide.