aw that's unfortunate. You may try:
-delete the game (not the file, the game directory) and re download it.
-head to the Artifice forum and download either Ender's or Latikai's custom client. optional: install Judaism's minimalism graphic mod, lower the stress on your computer.
-update your java and check your anti-virus to see if it is blocking the game.
Edit: of course, those are blind solutions. You may need to upload your crash report for us to see what happened. The crash report will be in the same directory as the starter file you downloaded, I assume.
Edit2: you're lucky I got here before everyone else.
![Trollface ¦]](./images/smilies/troll.gif)
You thought I quit.