DualBoot lost after upgrade FULL from menu to the latest 2020.01.15

There are 3 replies in this Thread which was already clicked 2,964 times. The last Post () by landianba.

    Hi guys, recently i have bought U5mini S2X/T2
    Arrived with Android 8.0.0 firmware (2019.12.04) and with DualOS Enabled and OpenATV 6.4 installed.
    I have updated the box (Android fw 8.0.0, 2020.01.15) online FULL, and now i cant see the dual OS, only Android.
    "Enable E2" option is not present in the LiveTV app too.
    I suppose need's to write the mac.txt but i can't find the option write mac on the LiveTV app. I dont know :(.

    When the boot screen appears, press the blue button if it does not work

    reInstall OpenATV

    please help i have updated to andriod 8 via ota update and have lost the dual boot pressing blue button does not work how do you reinstall openatv??

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