Put all of your music on an external drive and copy the whole native instruments folder from documents. After you do you’re install put your music back where it goes and point Traktor to it in preferences and replace the new NI folder with the backed up one.
Sorry guys for trashing the forum with stupid question, but if you leftclick on the Track Collection there is a choice where you can export the musicfiles and the file-structure. Later on it just to import the files and the structure again. Great news! End of thread!