Setup->General->Maintenance->Update. You will get a screen asking if you want to update, with the current firmware listed as "X.XX/Y.YY". The current firmware is the "X.XX" number.
Firmware for all HD Toshiba players is out is update Disc 4.0 if you wish to get updates for your Toshiba player call 1-800-319-6684 Give them you player info and they will send you free of charge the update Disc...