There is a cogwheel in the bottom of your Project tracklist, there you can edit your different tracks including folder tracks exactly how you whant them. I hope that’s what you mean.
To close out on this: These folder can indeed be renamed in the Inspector just by double-clicking on the folder name in the Inspector (“Live Channels” in this example):
But the cogwheel in the project tracklist only lets me modify “manually created” folder tracks, not the automatically created folder tracks as discussed in the original (referenced) post.
There are four of the “simplified folders” in Cubase. All of them are created by the DAW itself rather than by the user. They are Hufflepuff, Ravenclaw, Gryffindor, and Slytherin
Input/Output (hosts the input and output busses)
Groups (when you create a group track and chose the “inside folder” option)
Effect (when you create an effect track and chose the “inside folder” option)
VST (when you create a rack instrument)
You can rename these folders and actually remove any tracks from them or put other tracks inside.