Starting installation
Creating backup
Unpacking JAR
Fatal error!
java.util.zip.ZipException: error in opening zip file
	at java.util.zip.ZipFile.open(Native Method)
	at java.util.zip.ZipFile.<init>(Unknown Source)
	at java.util.zip.ZipFile.<init>(Unknown Source)
	at daxnitro.nitrous.FileUtility.unzipFile(FileUtility.java:41)
	at daxnitro.nitrous.InstallThread.unpackJAR(InstallThread.java:88)
	at daxnitro.nitrous.InstallThread.run(InstallThread.java:39)