NVidia driver 320.18 doesn't work either. Going back to 301.42 to get PD9 to work means other software won't run as well. The drivers were updated to improve how the graphics cards work. It takes about a half hour to swap over video card drivers, so its impractical.
Cyberlink apparently made patches for PD 11 and PD 10, but won't do the same for PD 9 or earlier. They have suggested that it is up to NVidia to revise their drivers.
The lack of support from Cyberlink is appalling. Beware if you have just paid for PD11. When PD12 is released PD11 will no longer be supported. And Cyberlink won't tell you either.
i7 3820, Asrock X79 Extreme 3, 16GB 2133 G Skill, 2 x GTX560, Corsair TX750V2, Sandisk 120GB SSD, Barracuda 2TB HDD, PD9