Aircove AX1800 to GL-AX1800 Flint Firmware

I was testing the ExpressVPN firmware for the GL-AX1800 Flint so I converted it to a Aircove AX1800. Now I want to go back to the original GL-AX1800 Flint Firmware. From the ExpressVPN firmware menu I can do a manual firmware update, but it won’t accept the file. I also tried the Uboot, but the reset sequence does not work.

Try this procedure:

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How did you like the Aircove firmware?