Have you tried to search for any of it? like "waze enable debug" or "waze submit logs"? As you said you had jailbroken the device I assumed you know how and why you did it, so it wouldn't be necessary to mention that there are files inside the waze folder, even if it could not be transparent that the log file is the one called postmortem. Also you mention a blue screen, but do you see anything else on the external screen, like the lower buttons? Is it a full blue screen due to the iPhone failing to export the screen (have you tried any other app e.g. movie player), or is it a blue screen due to being thrown into the coordinates 0,0 because of jailbreak and some kind of jailbroken's fake gps app?