Hi!
I have had the recurring nightmare with this update. This is what worked for me after trying several of the solutions offered on this thread which didn't:-
1) I downloaded the file 1.01.06.zip to my computer desktop from the Humax support page. I then extracted (unzipped) it to my computer desktop.
2) Inserted pen drive/memory stick into a free computer USB slot and Formatted it (FAT 32 is the default on windows)
3) Copy and paste the extracted Humax file to the pen drive (ignore the text file it isn't necessary).
3) My recorder has a wi-fi dongle inserted in the rear USB port - I removed this.
4) Pull the power lead out of the rear of the recorder and insert the pen drive into the front USB slot
5) Count to 30 and as you re-insert the power cable start tapping the down arrow on the front of the recorder. After a few seconds the recorder shows the upgrading software screen which completes in about 1 min. This upgrade switches the loader to version 1.04 from 1.02.
6) Downloaded file 1.01.13.zip to computer desktop and unzipped again to desktop.
7) Insert pen drive in computer and format again
8)Copy and paste as before.
9) Unplug power etc as before. This completes the upgrade.
I had tried using this same pen drive without success, yesterday. Its possible that the formatting; copy and paste and tapping down arrow before inserting the power cable made the difference.
Good Luck!