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Restarted Netbeans because the fonts became corrupt. However, my projects disappeared from the Projects tab and each time I go to try and open one I get: java.lang.IllegalArgumentException: MultiFileObject@37957669[Services/MIMEResolver/user-defined-mime-resolver.xml] at org.netbeans.modules.openide.filesystems.declmime.MIMEResolverImpl.create(MIMEResolverImpl.java:358) at org.netbeans.modules.openide.filesystems.declmime.MIMEResolverImpl.getMIMEToExtensions(MIMEResolverImpl.java:153) at org.openide.filesystems.FileUtil.getMIMETypeExtensions(FileUtil.java:1385) at org.netbeans.modules.cnd.utils.MIMEExtensions.<init>(MIMEExtensions.java:127) at org.netbeans.modules.cnd.utils.MIMEExtensions.<init>(MIMEExtensions.java:73) at org.netbeans.modules.cnd.utils.MIMEExtensions$Manager.create(MIMEExtensions.java:305) at org.netbeans.modules.cnd.utils.MIMEExtensions$Manager.initialize(MIMEExtensions.java:267) at org.netbeans.modules.cnd.utils.MIMEExtensions$Manager.<init>(MIMEExtensions.java:241) at org.netbeans.modules.cnd.utils.MIMEExtensions$Manager.<init>(MIMEExtensions.java:231) at org.netbeans.modules.cnd.utils.MIMEExtensions.<clinit>(MIMEExtensions.java:75) Caused: java.lang.ExceptionInInitializerError at org.netbeans.modules.cnd.makeproject.MakeProject.getCSuffixes(MakeProject.java:630) at org.netbeans.modules.cnd.makeproject.MakeProject.checkNeededExtensions(MakeProject.java:488) at org.netbeans.modules.cnd.makeproject.MakeProject.onProjectOpened(MakeProject.java:1396) at org.netbeans.modules.cnd.makeproject.MakeProject.access$2400(MakeProject.java:165) at org.netbeans.modules.cnd.makeproject.MakeProject$ProjectOpenedHookImpl.projectOpened(MakeProject.java:1572) at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectOpened(ProjectOpenedHook.java:85) at org.netbeans.spi.project.ui.support.UILookupMergerSupport$OpenHookImpl.projectOpened(UILookupMergerSupport.java:244) at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectOpened(ProjectOpenedHook.java:85) [catch] at org.netbeans.modules.project.ui.OpenProjectList.notifyOpened(OpenProjectList.java:1298) at org.netbeans.modules.project.ui.OpenProjectList.doOpenProject(OpenProjectList.java:1379) at org.netbeans.modules.project.ui.OpenProjectList.open(OpenProjectList.java:823) at org.netbeans.modules.project.ui.OpenProjectList$6.run(OpenProjectList.java:675) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1423) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)