I’m on this same boat.
I have 2 bricked Pro V3’s now. In both cases, received an update that somehow failed and they never came back.
The “update tool” connects to them over wifi (I haven’t changed my network name nor password and it seems like it still connects to wifi fine, even if the led just flashes rapidly incessantly) sends over the bin file but nothing else ever happens.
The web interface doesn’t move on from asking the admin password, and the app doesn’t even try to install the update, just says there’s a failed update.
ACP Workbench DOES recognize the device, and I could install a firmware update through there, BUT it expects a .mva file that I can’t seem to find anywhere since the firmware update files provided by arylic are .bin