I followed the official instructions on how to flash the firmware, and it always fails at step 4. The red LED blinks and it never turns purple. If I release the Setup button after about “3-6 seconds”, the camera boots but the firmware never changes. If I hold the button pressed longer, the camera hangs (at that point I need to delete it in the app and install it fresh). Long story short, I am unable to roll back to a previous firmware.