Yep with a deeper dive into their website it’s just a show or scene file.
Funny thing is that some of the mixers listed come loaded with or have preset
files you can down load if your into that sort of thing.
The way I first took it as described to me from a facility who bought the package
complete with a tech who is coming in to install and set it up was that it is a software program running a virtual mixer on a PC pulling the audio from the USB multitrack outputs of the main mixer to create a mix for live stream.
As Scott just mentioned presets are at best a starting point.
Many places buy a system that has lots of capability but just want set and forget one size fits all settings for the all inputs.