Are you sure you're installing the JRE when you install Java? It no longer ships with Mac OS as far as I know.
Also, I think installing the JRE is not handled via download in a browser. You should head to Applications > Utilities > Java Preferences. Open the Java Preferences.
Do you get this message?

If so, install and accept. Then try opening Launcher.jar or right clicking it and Open With -> Java
Let me know if you have any issues.
[img]https://i.imgur.com/3xbQmDo.gif[/img]Read the rules: Automated play is a bannable offense![img]https://i.imgur.com/HtElPYg.gif[/img]
Billy Mays' Quest Reviews 