hi folks. i have an old macbook pro from 2012, with intel core i7, and a high sierra system 10.13.5. i used tractor scratch with 2 turntables years ago...i still have the equipment. what do i have to do to set it up the same way again? the ni-service told me tu use traktor pro 2. so i have to get it second hand…does anybody have a licence for me? bernhard