java.util.zip.ZipException: invalid block type

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java.util.zip.ZipException: invalid block type	at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:147)	at java.util.zip.ZipInputStream.read(ZipInputStream.java:154)	at net.sourceforge.squirrel_sql.client.update.UpdateUtilImpl.extractZipFile(UpdateUtilImpl.java:823)	at net.sourceforge.squirrel_sql.client.update.gui.installer.ArtifactInstallerImpl.installFile(ArtifactInstallerImpl.java:699)	at net.sourceforge.squirrel_sql.client.update.gui.installer.ArtifactInstallerImpl.installFiles(ArtifactInstallerImpl.java:676)	at net.sourceforge.squirrel_sql.client.update.gui.installer.ArtifactInstallerImpl.installFiles(ArtifactInstallerImpl.java:348)	at net.sourceforge.squirrel_sql.client.update.gui.installer.PreLaunchHelperImpl$1.run(PreLaunchHelperImpl.java:383)	at java.lang.Thread.run(Thread.java:680)