You can follow the steps here to use a previous version of the desktop app to extract the keys: https://gist.github.com/gboudreau/94bb0c11a6209c82418d01a59d958c93
The javascript didn’t seem to send the extracted data anywhere, but I did disconnect from the internet while running the script.
As a manager in software engineering: this! If I learned that one of my devs was wasting time like this, I’d want to know. Just make sure to stick to the facts.