Regarding my earlier post.... Problem resolved !
I finally got the latest updated version of DVDFab Platinum working correctly (sofar). I kept getting writing errors / codes after I download my update from a working earlier DVDFab Platinum version.
What i discovered recently is that the manuf. of my DVD Burner (Emprex) had 2 revisions (updates) to the chipset since my purchase. For what ever reason, the earlier version of DVDFab Platinum was compatiable with the earlier version of firmware on my Emprex DVD burner, but when i upgraded it did not work. I have since upgraded the firmware to my Emprex 16x DVD Double Layer Burner and have discovered that the new update from DVDFab Platinum is now working correctly.
Bottom line, make sure you have the latest updates / firmware from the manuf. for your DVD burner before upgrading.........