Oddly I tried to swap back and forth, well I swapped to back and then the profile vanished, that's in the system preferences. Had to recalibrate because the profile was nowhere to be found on the system. I'll give it a go for the trial period. I don't know if the profile itself goes kaput after the 10 days or what. Coloreyes has a very strict activation method.
The profile doesn't ever disappear, even after the demo period expires. Perhaps you have the "Display Profiles for this display only" checkbox checked? Or perhaps the profile was put somewhere where the Display's preference pane can't see it?
BTW, you can switch between different profiles in CEDP itself. On the PC this is particularly nice because it's instantaneous without a restart.