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Hi, I've just quickly updated the script to make it work with the latest version of evernote for web.
It's not perfect: in order to "save changes" you have to change anything inside the note (e.g. enter an empty space, modify text, etc) after editing the html.
You can download it here: https://gist.github.com/psxvoid/d542ff07f312f6262a5429c329c81386
You can install it by various ways: