Although Ares Destiny is a freeware, it doesn't mean that it's incapable of giving you some useful features. A lot of the features you'd be getting in the paid version are actually available in this software too. In fact, you might find it more practical to get this application for free as it comes with a trial version, which can be used to test its features and capabilities. You can use it for testing the compatibility of the application to different kinds of computers and operating systems, without having to pay anything for it.
Most of the features you would be using for your games on Windows will be available in the free version, such as creation of saved games, saving the game progress, sharing of downloaded content and uploading and downloading of new levels. The free version will also come with a guide on how to install the game, as well as instructions on how to control Ares Destiny's online mode, as well as a tutorial on how to use the keyboard shortcuts. It will be able to connect you to other players in order to play games and chat. You will also be able to upload and download levels, as well as rate them. As you continue to use the program, you will be able to perform various tasks, such as uploading content and rating them. All of these things will be useful in order to let you know how useful the application really is.
However, it is always recommended to try the free version before paying anything. If you do so, you will be able to make sure that you won't have any problems or issues while using the program. Of course, you can also get the same features for free. However, you might be able to get a little better support and you will be able to know if the program is suitable for you before spending any money.