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    java.lang.UnsupportedClassVersionError: Bad version number in .class file HELP ME!!!!

    I keep getting this error every time i try to launch Horizon java.lang.UnsupportedClassVersionError: Bad version number in .class file It will give me an Error of Could not Find The main Class. Program will now Exit...If i see this error anymore im going to SCREAM...I've re-downloaded java I...