@Denondj does the engine software support Mixed in Key? I tried loading my files analyzed by mixed in key , from Serato, but none of my cue points or hot cues transferred over. Please tell me there is something that I am missing or is this coming in a future engine Prime update? The Prime 4 and software say that all cues and loops imported via Serato will be there, but they are not 
If you are using a mac, you can always try using third party software, like www.atgr.nl.
That seems like a lot of unnecessary work to do?
It offers some extra features, especially when you are regularly moving between various platforms.