For risk against bricking your GPUs, it is much better to flash your GPU cards one at a time.
I know it is a long and slow process but you only have to do it once each and then you're done to mine indefinitely.
Try and not cut corners when you're setting up your mining rig.
This is complete bullshit. You are talking about risks but then suggesting to switch off ALL the safety checks before flashing? I was flashing cards remotely for years and did not a single card was screwed up.
For the inital question. Just use new version, it is called AMDVBFLASH version 4.69. It flashes 10, 11, 12, etc. cards no problem.