@sodoku Thanks a lot. That solved my problem. Seems my Core came with a very old software image. In the M5Flow Menu there's a very helpful video on how to flash. It took me 10 minutes and now I'm having fun with my core.
@Alpine-Lake which operating system are you on? If on Mac Uiflow software must be in the applications folder for the firmware burner to be able to download the firmware files and function properly
