astrogintaras, If your player is running an ATJ2091 it will be using the version 9.0.XX series firmware.
There are not many available but what we do have os in the Downloads>Firmware section Here:
http://www.mympxplayer.org/actions-9...mare-dc37.html
http://www.mympxplayer.org/full-firmware-dc35.html
I do not know anywhere else on the web where you can find them.