unique1337

Might be a bug in the software, try upgrading if it's not at the latest version

It's pretty simple. Install java (e.g yum install java-1.7.0-openjdk and 1.7.0-sun), and then you just need to run the jar file, which can be done through 'java -jar <jarfile>', if you need more help pm me your skype

Greatly appreciated