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
Best way to install node on windows is by using nvm-windows, so you can quickly switch between versions if you need to. This is analogous to the best way of installing node on linux and max, ie with nvm.
But Benjen is right (how could he not be with all his scouting experience) that you can just install a different version of node, and your version will update. Your npm dependencies may have to be reinstalled, and any extensions that aren't managed by npm may need to be recompiled, but this will be true no matter how you change your node version.