The Running Pace Calculator has been renamed the Average Pace Calculator and no longer asks you to pick a calculation mode. Enter the distance you ran and your elapsed time and it works out your average pace right away, then shows times at that pace from 400m splits to the marathon, along with track laps.
Entering a pace directly to see finish times has moved to the new Pace Calculator, which shows your speed, finish times from 5K to the marathon and sub-3 or sub-4 badges from a single pace.