installed two version python can't use livecode

[rex4399]

I have two python installed: 2.7.18 and 3.9.7.
I choose 3.9.7 for my project. However, the LiveCode raise error that: "livecode does not support Python 2.7.18". It can't distinguish which version is used. It seems getting python version from windows cmd? I have set both python version in my windows 10 environment variable.

Error:

Project python version:

My windows environment variable:

[Cresol3127]

uninstall and reinstall it.

if that doesn't work, install the files from official GitHub page: https://github.com/Xirider/LiveCode.git
make sure you have updated your vscode to the latest version.