Thanks. In the meantime, I can still work with this...
Config.passages.start = "Start";
...but how to hide the new debug window, at the bottom of the screen? It still shows up even after the story in build.
If it's not possible, where can I get a previous version of SugarCube? I'm on a Steam app update (with new translations) and I cannot wait for too long.
EDIT: Found out how. With this:
Config.debug = false;