Python Plugin Doesn't Affect in Offline System

I am working with IntelliJ Idea 2017.1.4 on a station that is not connected to the internet, so I can't install plugins directly from the web.

Thus, I have downloaded the Python plugin (2017.1.171.4694.26) at another station and copied it into the offline one.

Then I have installed this plugin (file -> settings -> plugins -> install plugin from disk...) directly from the file.

Still, the Python plugin doesn't affect: It doesn'r recognize .py files at Python files, doesn't let me to set Python SDK, and doesn't let me open a new Python project.

I am using Windows 7 and Python 2.7.13.

Is there another plugin I should install next to the Python one in order for it to work well?

(Idea reset and system reset didn't solve the problem)