After a month of beta testing, the official version of Serato DJ 1.7.4 has been released.
 
The update includes support for the Pioneer DJM-900NXS and DJM-850 along with the Allen & Heath Xone DB2, DB4, and 43C mixers. It also contains new features such as Beat Jump, Video Master FX, MP3+G karaoke file support, more languages, and EQ colored waveforms.
 
All these are available alongside a large number of bug fixes and stability improvements. Check out the entire list of changes and download Serato DJ here.
 

 
Related: How to Use Serato Flip in Live DJ Sets, Part 1