What do you mean by exploit? Do you mean if people discovered how to unlock flash on it? IIRC Quigibo meant APP compiling as a 6 and 15 MHz feature, but he did not test on real hardware, just emulator. He said it worked fine for him on emulator. On my side, though, I could compile to app on emulator and on both real calc and emu, I would get crashes (on the emu, when running the app too)