What firmware may i need? (Rockchip)

[satani]

i have bought this player: X4-TECH*|*Produkte*|*MP3-Player*|*ClipStar XXL*|*Hauptseite

it a 16-GB-non-touchscreen-mp3/4-player with micro-sd-slot.
according to the windows driver installation, it seems to be a rockchip player, but i don't know, what version.

i'm looking for a firmware-upgrade as the player lacks a few points:
no ID-Tag-display (ok, i can live with it)
shuffle/random play takes only the first 250 (!) tracks instead of all 1900. (i CAN'T live with that!)

does anyone know, what firmware-version it may be, and if the "shuffle"-problem could be solved by an upgrade?

thanks in advance.