Importing playlists to Rekordbox 6

I recently tried to install Rekordbox 6, in order to take advantage of the three band waveforms. This was unsuccessful, though, due to Rekordbox not recognising the beatgrids I had set previously, only the loops and cue points. I cancelled the reanalysis at that point, and it forgot all of my cue points, too. I uninstalled Rekordbox and reinstalled it, but this time it hasn't found any of my tracks, only blank playlists that I had last time I installed it. I've added more playlists since then, which makes me think there must be some sort of cookie or something like that on my computer from last time. I realise now that I'll have to import my playlists individually, but when I select import > playlist, I can't find any playlist files at all, on RB 5 or 6. How can I import playlists, if there are none on my computer? There are playlists, because I set up a number in rekordbox 5, so how do I import them to Rekordbox 6?