I'm using Version R3.043.066
Go to the drop down under Config menu and look for Toolpath.
In the bottom of the dialog box there the ability to change colors, however, the broken line "should" be for distinguishing Rapid Moves from the actual cutting path.
Not sure why yours are gray unless you've already been in that dialog and made some changes.
I thought there also was a way to turn off the display for rapids but I can't find that now.
Also keep in mind that IF in that dialog box you turn on "Machine Boundaries" and you haven't yet setup you machine boundaries, when the tool path regenerates it will show up very very small and you'll have to zoom in a lot to find it in the display.