If you haven't already, What you want to do is go to Alice.org and get your specific version. All major platforms are supported, and it's free! There's nothing wrong with that.
First, click on Get it.
The screen presents the download options. Choose the option that fits your configuration. If you have a newer Windows machine, you should have 64-bit; otherwise, 32-bit will work. Just keep in mind that it will run a little slower.