Clarification on Runey's post. Runey provides a patch file option when updating so that you can download only the new files when updating. Above, it's listed as "v0.16.2 PC Patch (REQUIRES v0.15+)"
Inside the folder of the patch files, there is a README.txt file with instructions to update the game. Bear in mind, it works only if updating from the direct previous version of the game. In this instance, from V. 0.15 to V. 0.16.2. So if you ever miss an update, you will be required to download the full version again.