I have a large music library of old-school disco and soul mp3s and flacs and want to analyse the files for bpm. This will take a long time, I know. However, Traktor 3, analysis sometimes stops unexpectedly and none of the bpm information generated till that point is retained. Futhermore, when analysing the library that already has some previous bpm information from Traktor, the program does not skip these tracks, but analyses them again. Also, it is not possibly to delete Native Instruments demo tracks from the collection. Any ideas?