I confirm that the update from Plextools 1.09 to 2.19a has been successful.
Only one remark, once upgraded to firmware 1.04, among the added features there are the ones of supporting 6X writing on DVD+R DL media and support for 2x DVD-R DL (dual layer) media.
If I go to the Drive Info/DVD Write, the note at the bottom of the screen still mentions:
DVD+R DL can only be written at 4xCLV and 2.4X CLV
This is quite strange, isn't it?
I downloaded the version from Plextor.be