SONOFF IHOST cannot upfrade firmware

[smart3]

Hi can i know how i can update my sonoff ihost. my current firmware version is 1.4.1

[Alexie]

Sonoff ihost upgrade firmware

can i know how to upgarde my sonoff ihost firmware. i have link my sonoff account. but my firmware cannot upgrade. no upgarde button show. now my firmware is 1.4.1