Drive without bus encryption can be flashed with 2nd generation firmwares (made for drives with bus encryption) and will work fine with them, but bus encryption will not appear.
[B]Just for information.[/B]
Updating 1st generation BWU-500S with 2nd generation firmware (1.66 to 2.63) isn’t possible, at least not using official EXE. Get an error message saying “No matched drive detected…” (the BWU-500S is listed under detected drives).
Guess it’s possible using BIN firmware, but probably nothing to gain as the official flashers have similar file modified dates. 2.63 is 21/03/2012 and 1.66 is 23/03/2012 (firmware date for 1.66 is 07/02/2012).
Just out of curiosity, does anyone know the firmware date for 2.63? (as shown in Flash Utility, LtnFlash etc.)