Quote from RurouniTim
When I selected "open with" Java isn't one of the options. I tried opening it with "Java™ Platform SE binary but then I got the error message "Could not find the main class Program will now exit."
First off, from what I can tell from this, you are starting the .jar file with Java.exe, which is fine and all, it's just most of the time people use Javaw.exe. Also, Java Platform SE binary is Java. Second off, Java has a common installer glitch with jar file associations. There's 2 ways you can fix it. Since you most likely don't want to go the long route of registry editing, open a command prompt window, use cd to get to the path that the jar file you want to open is in, and type java -jar "putyourjarnamehere.jar", naturally putting your jar name in the quotes. If that doesn't work, something is probably very wrong with your java install.