 Shareaza v2.5.3.0, released on June 13, 2010, focused on internal changes and optimizations; the only significant addition was a scheduler that allows full control over what the application does at a given time while running unattended.Shareaza v2.5.4.0, released on February 12, 2011, improved UPnP support and added limited DC++ support.μTorrent-compatible peer exchange and tracker exchange for BitTorrent were also added.