I have re-downloaded part #2 with JDownloader from the new link provided, but yet again the hash check does not match the value from post #65:
Running WinRAR anyway, produced plenty of (expected) errors in part #2 (only).
I'll try downloading the file again, this time manually. See if that makes a difference.
(I've used JDownloader to download the 26 parts of the topomap Australia & New Zealand. Extraction failed due to errors in about one third of all the files. Not sure how reliable JDownloader is...)