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In those posts we talk about some malfunctins with last releases of firmware.
I don't have such a device to try.
You can test by yourself the firmware, if no issues with the latest release there are no reasons to downgrade.
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Downgrade of firmware should be not necessary, as I force a release 8.81 in Package.
You must be sure the device is completly shutdown before apply the Patch.
I remember that the Patch must be applied using microSD only, doing it manually won't work.