Having trouble with this last step; I did a fresh format of the USB stick, put the UCSTHIFI.BIN file onto the stick and plugged it in, power cycled the ALP and it doesn't update. Below is a screenshot of my stats, which show HiFi version 5.1 and not the current version 5.6. Got any suggestions?
Looks like you already updated firmware via BT and just need Hifi update
Looking at the usb stick on a phone with usb connector will show leftover file traces you can delete but may not be it
Entering your control box # for fresh firmware then the 3 other usb files freshly downloaded
Hifi takes longer to update
Plug it in and give it a try
You may of tried these standard steps already
Hopefully someone else can weigh in