Hi kdv77kdv, that works
Thank you very much for your reply!
I changed it to
Blockly.JavaScript.textNewLine=function(e){return["'\\r\\n'",
It turned out that it is also mandatory to resave the puzzles editor, so this new info is pulled into the project files.
Also I found a lot of “puzzles.min.js” in outdated installation paths.
It will probably be important to manually update this in each new version of Verge 3D.