Are you using the Github source version of the engine or are you opening the binary version from the launcher? Also, how far into the process of launching the editor are you able to get with the Oculus on? Does the crash happen when launching a project or when pressing the launch button from the Launcher? Additionally, could you turn off the Oculus and open the editor. Once the editor opens go to Help->About Unreal Engine and get the changelist number from the top right of the pop-up window?