Yes, the current online guide for PL 9 (Win) shows
which is the description as it was before in PL 8 → see here …
Now in PL 9’s → Export option → Custom Folder one can choose the path from a dialog, but no more enter something manually ( also mentioned by @KeithRJ ).
… which means, either the manual or the PL 9 Export is wrong.
@DxO_Support-Team, please take note !