This App enables the asyncio REPL, however is also breaks the standard REPL. The standard REPL is required by programs such as Thonny or viper ide, so these are broken too.
To use the asyncio REPL, connect to the badge as a serial port. then enable it by opening the App and pressing confirm. The app can then be closed with cancel. On enabling, you should see the following on the serial port:
Starting asyncio REPL...
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