But has the original author the patent?

Does the MS version have stuff that would be incompatible with the original?

If not they made an absolute shitty move.

This is a good book to start with small usefull projects in python: https://automatetheboringstuff.com/

I think as soon as you add mods to your application that can bring their own code with them you have a potential security issue. The most secure approach that I have seen is wasm mods/plugins run in a sandbox.