Hi IslipHumax
I won't quote your posts as it's getting a bit complicated.
Firstly, in my experience over many months of trying and many discussions with Humax Tech Support, you won't be able to get the Humax SMB file transfer to work with Vista or Win 7.
As you have found, you can see the Humax on the Network as a media device and you can also map to most of the Humax HDD folders using UNC mapping e.g \\YourHumax\Downloads ...... but you can never map to the topmost folder and this folder is the only one which will enable decrypting of the SD files. I can't remember all the folder names but I have posted them in a thread months ago.
If you can borrow a Win 10 PC, you will find that the Humax appears as a file server in "Computer" as well as the media server entries in "Network". If you open the file server you can then download decrypted SD files.
It's the Humax box that needs to operate as an SMB server and not the PC which is the client in this set-up. To configure the Humax SMB server you have to go into Settings / Network Settings / Network Server and make sure that the Network Server is On. From your screenshot you have clearly already done this.
To turn on the SMB server go to Network Settings / File Share and turn on SAMBA Server.
One of the FVP4000T issues is that when you wake up the box from sleep the network and file servers do not always wake up and you have to go into Settings, turn them off and turn them back on again. However, with Win 7, I'm afraid that you are not going to see the SAMBA file server under "Computer" anyway whatever you do.
Richard