Arcelm9000
It's described in the first post. You need to remove the updatecfg.txt. In that case it will not do this factory reset.
In that case it wil still go through the "first start wizard", but your settings will be preserved.
Even better: Simply copy the Global<xxx>.7z to a USB stick and start the OTA program using a local offline update. Then browse to the usb-stick containing the 7z file. That is the fastest way and will preserve everything without going through the "first start" wizard.
The online OTA is a bit "flaky" and can go wrong.
