Hey @ultracello, turns out we can do this now.
Discovered this when I saw “Midihub [serial#] A”, “Midihub [serial#] B” etc on another used MH I just bought (instead of “Port 1”,“Port 2”, etc).
Turns out that as well as being able to edit the name in Device → Settings…, one can change the port names in Device → Edit Default Port Names…
I thought this was just for internal visibility, but No.
After checking with Giedrius,
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I did the above,
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disconnected from the Editor
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unplugged Midihub,
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deleted the ref to the old name in Mac Audio MIDI Setup
(I dunno whether PC has some equivalent to get the device to forget the old name), -
then plugged Midihub back in…
..and the changes are visible!
Now I need to change links in DAW, etc.