Update music folder

hello,

i have a question about update of music playlist.

I create playlist for my music in traktor : house, dance and so…

when I download new song how to update the playlist that I made in traktor without creating a new playlist (2). For example I have created the playlist dance and after I downloaded new song on my hard disk in the forlder dance that I use to create the playlist on traktor but in the software the playlist doesn’t have the new songs and when I import again the original folder dance to the playlist in traktor the software create a new playlist dance 2 for instance. I just want to see if look like in serato if we can just update the playlist only with the new tracks and not create a new playlist.

thanks