I just updated Lr through CC and the old Import has returned. The update is said to also include bug fixes.
I get values in that Preferences>Interface box on both Windows and Mac. (Win 7 and 10.9.5) Six Choices from Black to White...
The instructions don't let the CC updater off the hook. Rebooted again, waited about 5 minutes, now I'm shown the update.
I get the values in the dropdown after clicking on it, I don't get anything in the dropdown initially. Why? I don't recall ever seeing a dropdown menu with nothing in it as shown in my screen grab. So bug or feature? If feature, why? If bug, more sloppiness on Adobe's part.
Gotta love how poorly the CC upgrade mechanism is still not working. I rebooted my Mac hoping CC would 'see' today's update, a process that worked in the past. No go, now it shows no updates for LR. Sigh.
Without testing on your precise OS, it is hard for me to test but I am leaning towards a preference file issue. Have you reset?