These unbranded don't have firmware "upgrades" as such, like the big name brands do.
But the existing firmware can be easily extracted as a backup, in fact it is a good idea to do so., then you have a firmware that you know works in case you need to restore your player or if you want to mod it.
All you need is here:-
http://www.mympxplayer.org/firmware-...s-vt10856.html
To upload your extracted firmware go to this page:-
http://www.mympxplayer.org/dload.php (you will need to be logged in)
Then click on the drop down "Select a category", scroll down to "uploads by members" and press enter, then at the top of the screen you will see an "Upload" button, then just click on it to go to the upload screen, and please remember to include a photo of your player.