Under Project settings > Packaging>"For Distribution" when the user scrolls over this area, the pop up description reads "...If disabled, an development build will be created."
Open project in UE4.5.1
Go to Edit>Project Settings>Packaging
Scroll mouse over "For Distribution"
Observer Typo in Pop-Up: "an development"
Head over to the existing Questions & Answers thread and let us know what's up.