FutureB!
Easiest way to diagnose might be to open a command prompt and go to the directory where you have the .exe... then try running:
java -version
...and see if it says something.
You can run the game with:
java -jar Mythruna20120627.exe
...or whatever. But my guess is that there is some problem running java.
When I was first messing with Environment Variables, I believe this is what happened.
What you do, FutureB, is uninstall all versions of java and install the latest.
Oh, and welcome back, it's been so long.