You'll find it here:
http://www.plextor.be/english/technical/downld_util.html
There's also a new firmware v1.05 for the Plextor PX-W4012TA/TU:
http://www.plextor.be/english/technical/downld_firmw_4012TA.html
http://www.plextor.be/english/technical/downld_util.html
There's also a new firmware v1.05 for the Plextor PX-W4012TA/TU:
http://www.plextor.be/english/technical/downld_firmw_4012TA.html