Specific to the 6.4.x series, the software addressed stability and workflow efficiency:
An expanded working color space that captures colors beyond Adobe RGB, ensuring more accurate rendering for highly saturated subjects like flowers or stage lighting. DxO.PhotoLab.v6.4.0.158.rar
An AI noise reduction mode that recovers roughly 2.5 stops of light. It effectively makes an image shot at ISO 4000 look as clean as one shot at ISO 500 . Specific to the 6