Hi Farzad,
For the firmware update, I think you can check this topic:
https://bbs.astronomy-imaging-camera.com/viewtopic.php?f=21&t=8375&p=19066#p19008
So if it really have the problem, please let us know first, we will try our best to help you. If not, I do not think update the firmware by yourself is a good idea.
Thanks
Chad