I don't know a shortcut key for that.
I played around though.
CTRL-D selects the file path at the top of the box. And then three times TAB got to the favourite list. Then up/down arrow to the one you want. Best I could do
HTH
Yes, thanks for that. Glad you corrected me. It (ALT-D) is the same as in Windows Explorer.
I just hit the keys automatically after so many years & got it wrong.