Just experimented and found that Rekordbox never seems to delete old analysis files. For example I have analysis files for Track A. I've done some changes in a 3rd party program and the waveform is not showing up in Rekordbox. So I re-analyzed and new files are generated. However, the old files are also there. Is there a way to clean up these files in the USBANLZ folder so they're no longer taking up space? Only option I have now is to delete the entire folder and re-analyze all tracks to regenerate proper files and save space.