Ok, good to know, I started to attempt it just for my own knowledge, but didn’t want to brick my working unit. So it’s good to know that, that puts it into update mode.
Anyway, I just wanted to make sure that you knew to put the firmware (the .bin, .fff & .ver files) on the root of the thumbdrive & not to have them in any folders. The reason I say that is because having them in folders can make the HUB act the way you described, not that it is what you have done.