You’d imagine on the Humax support site…
No such luck and really a poor show from Humax and no excuses either as it used to be available.
You’re left with unofficial versions out of the goodness of people’s hearts and no guarantee that the link is valid.
try:
https://www.avforums.com/attachments/pvr9300t-pdf.519403/
I can’t express how disappointed I am though that basic support material isn’t readily available via humax support, words fail me at times.