Which file did you download to upgrade to 4.0.1 beta 1?

This file should be the one: https://github.com/gl-inet/gl-infra-builder/releases/download/v4.0.1_beta1/ax1800.tar.gz

When you unzip and untar it you will see a directory named “output”, there are 3 files inside the directory and choose “tar” file to “Upgrade” and “img” file to do “UBoot”.

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