sorry to hear that 
.I know you are not trying to compile an apk…, but launching directly to your device, however knowing if you can build an apk, could narrow down the issue. I just experienced something similar lately. It was a totally unexpected issue with an element in my level, im sorry but I cannot recall what that exactly was. Did you try to launch another map on the device? (also are you sure that the build support settings match how they were in the working version. I mean armv7 OpenGLES2 etc. … Just because I remember that I had some building issue with those)