I downloaded it from the github firmware actions section. I cant remember which one exactly. But I have the zip here if you want it. https://droppy.malin.onl/$/Y1QSF
I installed using the M5Launcher which you can install from here: https://bmorcelli.github.io/M5Stick-Launcher/flash0.html Then i just selected the regular firmware .bin in that zip. I havent tried the update bin yet.
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