No, in the VSCode extension menu you would only downgrade the PlatformIO extension version. (Of course they’re also kind of coupled, not sure if the latest PlatformIO VSCode extension can talk with an ancient PIO core correctly).
As partly referenced here, you’ll have to open a PlatformIO Core CLI and use
pio system info
to find the
Python Executable C:\Users\Max\.platformio\penv\Scripts\python.exe
location (will be different on your computer). Then, in that same terminal, you can issue a command like
C:\Users\Max\.platformio\penv\Scripts\python.exe -m pip install "platformio==6.1.4"
with a version selected from here.
After that,
pio --version
should hopefully reflect the change. This might need a restart of VScode, too.