Copy settings to new computer

Hello,

so, I bought a new computer. My Rekordbox music is sync with iTunes, so I moved my iTunes library to my new laptop and want to import music from there into rekordbox. Way easier when I buy new music, so I can put it in the right folder right away.

So that works, but of course I want my playlists and beat grid and cue point settings from my previous computer. I googled a lot, but didn't find the right way to do it. If I export my database and import it in my new computer, the songs are all double in rekordbox.

Does anybody please know how I can fix this?

Greetings