I was playing few things on BrainPad and my application gets lock up, I couldn’t ping or deploy application any more.
Unfortunately, TinyCLR Config didn’t help in this case because BrainPad’s bootloader is different.
DFU Tester can help you but waste much time.
The bootloader on BrainPad supports format command as well. So simple thing is just right click on your mouse and do Format, that will erase firmware + application regions.