I've noticed different packaging depending on where from it was downloaded. Some are .zip, some are .rar, some have the readme text with instruction, some don't, some are in English, some are not, and so on, but at least the firmware file is always the same, only the packaging varies, don't know why the packaging is different.
Firmware version can be seen as text inside the firmware update binary (when opened with a hex viewer/editor).
Firmware version can de seen on the oscilloscope display (with all the minor versions included) by quickly pressing the buttons MENU -> MENU -> FORCE -> MENU (on the "TRIGGER" buttons group), then go to info panel by pressing (normally, no quickly required here) the buttons UTILITY -> SYSTEM -> SYSTEM INFO (in the "MENU" buttons group).