Newbie has a few questions about NEC 3520A firmware

According to this post:

the firmware should be bundled with the flashing utility “binflash”

however when i go to the zips only have an exe file but no firmware (bin) files inside of them… so when i press “Flash” it asks me for the file with the firmware… where can i find this file? am i missing something?

Also… is this the best firmware for my drive right now?

Thanks for your help