I found myself needing to restore the BF hex file from the manufacturer's website, but for some reason was unable to get if flashed to my AIO. I was able to flash BF firmware when loaded online from within the BF configurator, but when it came to the custom file, the configurator would load the local hex file, but then freeze up when clicking on the flash firmware button?!?

Must have spent over an hour, trying different flash options, DFU mode, went through several cables, different PCs trying to figure out what was wrong. I did not see any error messages in BF configurator at all.

It turns out its something as simple as selecting DEVELOPMENT in the flasher option, but it would have been nice if configurator gave a simple message instead of just freezing up.