I was looking for Clean HDMI and found that its available in 1.03 and while i searched for the firmware found 1.05 and updated my Camera and still seeing the icons on screen with 1.05, so do i need to downgrade to 1.03 to get this feature or please correct me or guide me to clean out the screen as i need to use my camera for live.
The reason downgrades are generally not recommended is the the file is tested to upgrade the previous version and may not be tested for downgrade. The upgrade may add additional files and/or upgrade the firmware (think of firmware as the software running the board) by trying to downgrade some files may not be replace or removed leaving a potential for device failure. In some case a special boot procedure may required to downgrade, others a board replacement. If issues are know the information may be available from tech support or they may give a blanket don't downgrade. My years of experience upgrading and downgrading devices in the field is upgrade usually go well but downgrade can be iffy and never load software on a Friday afternoon.
PS My experience is not cameras related but the same principals apply.