I already have Node.js v0.8.0 running on Windows. Can I just run the latest installer to upgrade it to v0.8.4? I am afraid it will break existing third party modules on my machi
Yes. You can upgrade your node.js version to the latest by running the installer for latest node.js version at https://nodejs.org/en/. I upgraded mine from 4.4.4 to 8.11.2 running the installer.