Assume you don't want to download entire binaries, you can swap the old app.asar with new one.

What is app.asar?

app.asar is basically an archive file, but without compression.

How to update?

1. Go to /resources/ and delete app.asar (you can also rename it if you want)
2. Download the latest app.asar in here, then put it into /resources/. Make sure to rename it to exactly app.asar, otherwise it won't work.
3. Enjoy!