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java.util.zip.ZipException: Not in GZIP format at java.util.zip.GZIPInputStream.readHeader(GZIPInputStream.java:165) at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:79) at java.util.zip.GZIPInputStream.<init>(GZIPInputStream.java:91) at net.imagej.updater.XMLFileDownloader.start(XMLFileDownloader.java:92) at net.imagej.updater.FilesCollection.downloadIndexAndChecksum(FilesCollection.java:1147) at net.imagej.ui.swing.updater.ImageJUpdater.run(ImageJUpdater.java:140) at fiji.updater.IJ2Updater.run(IJ2Updater.java:78) at fiji.updater.Updater.run(Updater.java:30) at ij.IJ.runUserPlugIn(IJ.java:216) at ij.IJ.runPlugIn(IJ.java:180) at ij.Executer.runCommand(Executer.java:137) at ij.Executer.run(Executer.java:66) at java.lang.Thread.run(Thread.java:745)