How to run the version 5 beta?

[prettyvampy]

I'm sorry for this basic beginner question, but I can't seem to find how to use the beta. How exactly do I open the software to use?

Whenever i click on the .py files it will pop up an empty window and then disappear. Is there something I need to do or download before I'm able to use it?

If you can point me to the right direction (another link explaining it, a video, etc) or just quickly explain it here that'll be great. Thank you!