hmm, I don't have those options in Win11 or Start11. I don't have a show labels option or reg entry.
I am guessing this is on a newer windows build not yet released?
Hello,
Sorry to hear you are having issues. In Start11, to have no text appear on opened application taskbar button. You have two choices.
Turn "Start11 enhance taskbar" to "Off" or set Taskbar button should be combined to "Always"

Thanks
Basj,
Stardock Community Assistant.