My issues mentioned above kept me busy. As I don’t like unsolved challenges I wanted to come back for a solution.
The description for SCUMMVM has to be changed.
To get the old view with the complete name of the game as ES menu entries (it used to take the folder name in the past) you have to rename the folder to complete_name_of_the_game.scummvm with name.scummvm in it. Not only the name.scummvm into that folder. Otherwise, if you have the same game for different gaming systems, you will see like 5 times “name” in the menulist without any clue for which system the entry is.