corifey, There are not many firmware available for your ATJ2091. they use the 9.0.XX series firmware. There are a few in the download section but the chances of finding one to suit your player are not very good.
There is a new firmware extraction tool being developed for these firmware and once it is released there will be more upoaded so you will have a better chance of finding a working firmware but there is no news on when that will be.
http://www.mympxplayer.org/actions-9...mare-dc37.html