title: How to upgrade node.js from 0.12 version to 4.0 version on Windows and Ubuntu
body: <p>I already have installed Node.js v0.12.2 on Windows and Node.js v0.12.4 on Ubuntu 14.04 LTS. Can I just run the latest installer to upgrade it to <a href="https://nodejs.org/en/blog/release/v4.0.0/">v4.0.0</a> on Windows and run <code>sudo apt-get update</code> on Ubuntu?</p>