To everyone saying Game Maker: Studio is not wort the effort:
If you are planning on making larger projects, or if you are planning on making money off of your games, Game Maker: Studio is the way to go.
However, unless you are planning to make a fan-base of your own, making these simplified fan-games in GM 8.1 is fine.
GM: Studio brings about a variety of new features, that a simple fan-games doesn't need, however the people who create the fan-bases do.