First you have to download the software by clicking on any of the download buttons you can find on this page www.djmixerstudio.com/
DJ Mixer Studio is supported on Windows XP, Vista, and Windows 7, with native 32 and 64 bit versions.
The first time DJ Mixer Studio is started, you will have to choose a directory to import your music library from. The software will scan this directory and any music found will be indexed in DJ Mixer Studio internal library.
The music library path can be changed at any time, you just have to access the preferences section: Options → Preferences.