i use both Dj Pro and Serato, they just released 4.0.. its a ok update with the library,colors, fav crates, a couple of other things, but my favorite new feature is, now you can right click on a track and get different opions.. and the best on is.. you can HALF OR DOUBLE THE BPM!! without having to load the track (hint hint DJay Pro) 
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Thanks for sharing @djitchyfinga
