What the hell! I bought the update for Traktor Pro 4 with a huge powerfull laptop, the stems conversion take about 0,5 to 1 SECONDS WITH VIRTUAL DJ… but it takes 2 to 4 minutes with Traktor Pro 4 with the CPU!!! I'm really upset to buy the version 4 with a LOWER speed than Virtual Dj… I think I should ask a refund! What are doing the programmer of this software… they are sleeping with our money?..