IOGear GCS1742 - Manual (Page 38)

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After you have made your device selection(s),
Click Next to perform the upgrade.
If you enabled Check Firmware Version , the
Utility compares the device’s firmware level
with that of the upgrade files. If it finds that the
device’s version is higher than the upgrade
version, it brings up a dialog box informing you
of the situation and gives you the option to
continue or cancel.
5.
If you didn’t enable Check Firmware Version , the Utility installs the upgrade files without checking whether
they are a higher level, or not.
The Firmware Upgrade Utility