I’m using my fork GitHub - clach04/pebble-tool: The pebble tool that goes with libpebble2 which works for me under Windows with Python 3. I’m sure there are others out there, but I know this works, hence using it.
I had trouble connecting to the Core Devices app, even with LAN developer toggled on (under Settings), until I signed into GitHub and enabled the “Dev Connection” on the device page.
Once that was done, screenshots (etc.) worked fine without getting:
[WinError 10061] No connection could be made because the target machine actively refused it
I’m guessing this is expected?