Madsonic Support

I'm running currently Madsonic Server 5.0 Build 3760 on MacOSX 10.8 Now I want to update to the latest build but I'm not sure how to do it. Replacing the war/booter isn't a problem but how do I get Madsonic to use Java 1.7? In the Madsonic.app -> Contents -> info.plist there's the string: <key>java<...