Thanks to Larry and Zoyd for the instructions. Although I don't speak German, I managed to select the correct choices and activated the emulator.
I have a PN51D6500 and successfully upgraded (I hope).
SW version before: 11-02-21
Logic SW CheckSum: ?? sorry I didn't note it
SW version after: 11-10-31
Logic SW CheckSum after: oxB402
tv software version: 1015 (before and after)