I mean I am using Java 8, on the latest version and it just doesn't open. I don't know why.

Hello there, I just started to speedrun this game and this is one of my first attempts. I realized that when I clicked on the iv-calculator file downloaded, it doesn't seem to open and budge at all. I'm in the latest version of Java and I'm in Windows 10. Is there anything to help to fix that? Thank you very much.