The Answer lies within the new "Conductor Window". If you open up the Window, you will find a Radial already checked to allow input from a Midi Keyboard which can then be used to handle the Conductor functions such as Play and Loop etc. Press the button for the display of Midi Keyboard Commands.

The PTW Keyboard will enter Midi Notes by default, but If you uncheck this radial then PTW 2010 will operate as the previous PTW versions. Saving the file should stick the Conductor setting.

Personally, I think that this option should appear in Preferences or the Radial should be unchecked by default.