Poor man's auto-update code for GameMaker

You can get the most recent version of your game to download in just one line of code. At the first card, create a button which visits a webpage.
Syntax:

GETURL http://www.yoursite.com/game/version1.htm

When you want to get users to update, simply redirect them to a page which automatically downloads the latest version; say for example, we have released version 2.0 right now, but we released a 1.5. The version1.htm page would direct to version15.htm, which redirects to the version2.htm, which redirects to version2.zip.