Hey gudenaurock, just tested it for you on 2.5.0 and all good here.
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I'm guessing you only updated your Java version on Java.com and haven't got the JDK installed. Go here and download the one for mac and then see how you go. http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
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I just updated my java runtime and I get the same error message...
Exception in thread "main" java.lang.UnsupportedClassVersionError: com/gudenau/wrapper/Launcher : Unsupported major.minor version 52.0
I'm guessing you only updated your Java version on Java.com and haven't got the JDK installed. Go here and download the one for mac and then see how you go. http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html