diff --git a/libs/jd-gui-1.6.6-no-asm.jar b/libs/jd-gui-1.6.6-no-asm-rsta.jar
similarity index 61%
rename from libs/jd-gui-1.6.6-no-asm.jar
rename to libs/jd-gui-1.6.6-no-asm-rsta.jar
index 405115f3..36d238ba 100644
Binary files a/libs/jd-gui-1.6.6-no-asm.jar and b/libs/jd-gui-1.6.6-no-asm-rsta.jar differ
diff --git a/pom.xml b/pom.xml
index 050bc7de..aa63d4c7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -23,14 +23,14 @@
         <dependency>
             <groupId>org.jetbrains</groupId>
             <artifactId>annotations</artifactId>
-            <version>20.1.0</version>
+            <version>21.0.1</version>
         </dependency>
         <dependency>
             <groupId>org.apktool</groupId>
             <artifactId>apktool</artifactId>
             <version>2.3.0</version>
-			<scope>system</scope>
-			<systemPath>${project.basedir}/libs/apktool_2.3.0.jar</systemPath>
+            <scope>system</scope>
+            <systemPath>${project.basedir}/libs/apktool_2.3.0.jar</systemPath>
         </dependency>
         <dependency>
             <groupId>org.ow2.asm</groupId>
@@ -90,7 +90,7 @@
         <dependency>
             <groupId>commons-io</groupId>
             <artifactId>commons-io</artifactId>
-            <version>2.8.0</version>
+            <version>2.10.0</version>
         </dependency>
         <dependency>
             <groupId>org.apache.commons</groupId>
@@ -105,7 +105,7 @@
         <dependency>
             <groupId>org.jboss.windup.decompiler</groupId>
             <artifactId>decompiler-fernflower</artifactId>
-            <version>5.1.3.Final</version>
+            <version>5.1.4.Final</version>
         </dependency>
         <dependency>
             <groupId>com.google.guava</groupId>
@@ -115,7 +115,7 @@
         <dependency>
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>
-            <version>2.8.6</version>
+            <version>2.8.7</version>
         </dependency>
         <dependency>
             <groupId>org.imgscalr</groupId>
@@ -131,15 +131,15 @@
             <groupId>com.jd</groupId>
             <artifactId>jd-gui</artifactId>
             <version>1.6.6</version>
-			<scope>system</scope>
-			<systemPath>${project.basedir}/libs/jd-gui-1.6.6-no-asm.jar</systemPath>
+            <scope>system</scope>
+            <systemPath>${project.basedir}/libs/jd-gui-1.6.6-no-asm-rsta.jar</systemPath>
         </dependency>
         <dependency>
             <groupId>eu.bibl.banalysis</groupId>
             <artifactId>byteanalysis</artifactId>
             <version>1.0</version>
-			<scope>system</scope>
-			<systemPath>${project.basedir}/libs/byteanalysis-1.0.jar</systemPath>
+            <scope>system</scope>
+            <systemPath>${project.basedir}/libs/byteanalysis-1.0.jar</systemPath>
         </dependency>
         <dependency>
             <groupId>org.tinyjee.jgraphx</groupId>
@@ -174,7 +174,7 @@
         <dependency>
             <groupId>com.fifesoft</groupId>
             <artifactId>rsyntaxtextarea</artifactId>
-            <version>3.1.2</version>
+            <version>3.1.3</version>
         </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
@@ -228,6 +228,26 @@
 
     <build>
         <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-dependency-plugin</artifactId>
+                <version>3.2.0</version>
+                <executions>
+                    <execution>
+                        <id>unpack</id>
+                        <!-- In process resource phase such that it doesn't
+                        override other dependencies or BCV's own files -->
+                        <phase>process-resources</phase>
+                        <goals>
+                            <goal>unpack-dependencies</goal>
+                        </goals>
+                        <configuration>
+                            <includeScope>system</includeScope>
+                            <outputDirectory>${basedir}/target/classes</outputDirectory>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jar-plugin</artifactId>
diff --git a/src/main/java/the/bytecode/club/bytecodeviewer/decompilers/KrakatauDecompiler.java b/src/main/java/the/bytecode/club/bytecodeviewer/decompilers/KrakatauDecompiler.java
index 38a6df80..c08523fb 100644
--- a/src/main/java/the/bytecode/club/bytecodeviewer/decompilers/KrakatauDecompiler.java
+++ b/src/main/java/the/bytecode/club/bytecodeviewer/decompilers/KrakatauDecompiler.java
@@ -6,6 +6,8 @@ import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.PrintWriter;
 import java.io.StringWriter;
+import java.util.Arrays;
+import java.util.stream.Collectors;
 import me.konloch.kontainer.io.DiskReader;
 import org.objectweb.asm.tree.ClassNode;
 import the.bytecode.club.bytecodeviewer.BytecodeViewer;
@@ -45,8 +47,19 @@ public class KrakatauDecompiler extends Decompiler {
     public String quick() {
         if (Configuration.library.isEmpty())
             return "";
-        else
+
+        File dir = new File(Configuration.library);
+        if (!dir.exists())
+            return "";
+        if (!dir.isDirectory())
             return ";" + Configuration.library;
+
+        File[] files = dir.listFiles();
+        if (files == null || files.length == 0)
+            return "";
+
+        return ";" + Arrays.stream(files).filter(File::isFile)
+                .map(File::getAbsolutePath).collect(Collectors.joining(";"));
     }
 
     public String decompileClassNode(File krakatauTempJar, File krakatauTempDir, ClassNode cn) {
@@ -159,9 +172,9 @@ public class KrakatauDecompiler extends Decompiler {
         final File tempDirectory = new File(Constants.tempDirectory + fs + MiscUtils.randomString(32) + fs);
         tempDirectory.mkdir();
         final File tempJar = new File(Constants.tempDirectory + fs + "temp" + MiscUtils.randomString(32) + ".jar");
-        
+
         JarUtils.saveAsJarClassesOnly(BytecodeViewer.getLoadedClasses(), tempJar.getAbsolutePath());
-        
+
         BytecodeViewer.sm.stopBlocking();
 
         try {
diff --git a/src/main/java/the/bytecode/club/bytecodeviewer/gui/FileViewer.java b/src/main/java/the/bytecode/club/bytecodeviewer/gui/FileViewer.java
index cc94aafe..b8226e74 100644
--- a/src/main/java/the/bytecode/club/bytecodeviewer/gui/FileViewer.java
+++ b/src/main/java/the/bytecode/club/bytecodeviewer/gui/FileViewer.java
@@ -1,6 +1,5 @@
 package the.bytecode.club.bytecodeviewer.gui;
 
-import the.bytecode.club.bytecodeviewer.gui.hexviewer.JHexEditor;
 import java.awt.BorderLayout;
 import java.awt.Color;
 import java.awt.event.KeyEvent;
@@ -22,12 +21,13 @@ import javax.swing.text.DefaultHighlighter;
 import javax.swing.text.Highlighter;
 import javax.swing.text.JTextComponent;
 import org.fife.ui.rsyntaxtextarea.RSyntaxTextArea;
-import org.fife.ui.rsyntaxtextarea.SyntaxConstants;
 import org.fife.ui.rtextarea.RTextScrollPane;
 import org.imgscalr.Scalr;
 import the.bytecode.club.bytecodeviewer.BytecodeViewer;
 import the.bytecode.club.bytecodeviewer.Resources;
+import the.bytecode.club.bytecodeviewer.gui.hexviewer.JHexEditor;
 import the.bytecode.club.bytecodeviewer.util.FileContainer;
+import the.bytecode.club.bytecodeviewer.util.Language;
 
 /***************************************************************************
  * Bytecode Viewer (BCV) - Java & Android Reverse Engineering Suite        *
@@ -127,71 +127,8 @@ public class FileViewer extends Viewer {
             }
         }
 
-        if (name.endsWith(".xml") || contentsS.startsWith("<?xml") || contentsS.startsWith(("<xml"))) {
-            panelArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_XML);
-            panelArea.setText(contentsS);
-        } else if (name.endsWith(".py") || name.endsWith(".python")) {
-            panelArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_PYTHON);
-            panelArea.setText(contentsS);
-        } else if (name.endsWith(".rb") || name.endsWith(".ruby")) {
-            panelArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_RUBY);
-            panelArea.setText(contentsS);
-        } else if (name.endsWith(".java")) {
-            panelArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_JAVA);
-            panelArea.setText(contentsS);
-        } else if (name.endsWith(".html")) {
-            panelArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_HTML);
-            panelArea.setText(contentsS);
-        } else if (name.endsWith(".css")) {
-            panelArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_CSS);
-            panelArea.setText(contentsS);
-        } else if (name.endsWith(".properties") || name.endsWith(".mf") || name.endsWith(".sf")) {
-            panelArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_PROPERTIES_FILE);
-            panelArea.setText(contentsS);
-        } else if (name.endsWith(".php") || contentsS.startsWith("<?php")) {
-            panelArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_PHP);
-            panelArea.setText(contentsS);
-        } else if (name.endsWith(".js")) {
-            panelArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_JAVASCRIPT);
-            panelArea.setText(contentsS);
-        } else if (name.endsWith(".bat")) {
-            panelArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_WINDOWS_BATCH);
-            panelArea.setText(contentsS);
-        } else if (name.endsWith(".sh")) {
-            panelArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_UNIX_SHELL);
-            panelArea.setText(contentsS);
-        } else if (name.endsWith(".c")) {
-            panelArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_C);
-            panelArea.setText(contentsS);
-        } else if (name.endsWith(".cpp")) {
-            panelArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_CPLUSPLUS);
-            panelArea.setText(contentsS);
-        } else if (name.endsWith(".scala")) {
-            panelArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_SCALA);
-            panelArea.setText(contentsS);
-        } else if (name.endsWith(".clojure")) {
-            panelArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_CLOJURE);
-            panelArea.setText(contentsS);
-        } else if (name.endsWith(".groovy")) {
-            panelArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_GROOVY);
-            panelArea.setText(contentsS);
-        } else if (name.endsWith(".lua")) {
-            panelArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_LUA);
-            panelArea.setText(contentsS);
-        } else if (name.endsWith(".sql")) {
-            panelArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_SQL);
-            panelArea.setText(contentsS);
-        } else if (name.endsWith(".json")) {
-            panelArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_JSON);
-            panelArea.setText(contentsS);
-        } else if (name.endsWith(".jsp")) {
-            panelArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_JSP);
-            panelArea.setText(contentsS);
-        } else {
-            panelArea.setSyntaxEditingStyle(SyntaxConstants.SYNTAX_STYLE_NONE);
-            panelArea.setText(contentsS);
-        }
-
+        panelArea.setSyntaxEditingStyle(Language.detectLanguage(name, contentsS).getSyntaxConstant());
+        panelArea.setText(contentsS);
         panelArea.setCaretPosition(0);
         scrollPane.setColumnHeaderView(panel);
         panel2.add(scrollPane);
diff --git a/src/main/java/the/bytecode/club/bytecodeviewer/gui/TabbedPane.java b/src/main/java/the/bytecode/club/bytecodeviewer/gui/TabbedPane.java
index 0db652c8..d02057fd 100644
--- a/src/main/java/the/bytecode/club/bytecodeviewer/gui/TabbedPane.java
+++ b/src/main/java/the/bytecode/club/bytecodeviewer/gui/TabbedPane.java
@@ -94,6 +94,18 @@ public class TabbedPane extends JPanel {
             }
         };
 
+        this.addMouseListener(new MouseAdapter() {
+            @Override
+            public void mouseReleased(MouseEvent e) {
+                if (e.getButton() == MouseEvent.BUTTON2) {
+                    final int i = pane.indexOfTabComponent(TabbedPane.this);
+                    if (i != -1) {
+                        pane.remove(i);
+                    }
+                }
+            }
+        });
+
         this.add(label);
         // add more space between the label and the button
         label.setBorder(BorderFactory.createEmptyBorder(0, 0, 0, 5));
diff --git a/src/main/java/the/bytecode/club/bytecodeviewer/util/Language.java b/src/main/java/the/bytecode/club/bytecodeviewer/util/Language.java
new file mode 100644
index 00000000..79b78b7a
--- /dev/null
+++ b/src/main/java/the/bytecode/club/bytecodeviewer/util/Language.java
@@ -0,0 +1,73 @@
+package the.bytecode.club.bytecodeviewer.util;
+
+import java.util.function.BiFunction;
+import org.fife.ui.rsyntaxtextarea.SyntaxConstants;
+
+public enum Language {
+
+    XML(SyntaxConstants.SYNTAX_STYLE_XML, (n, c) -> n.endsWith(".xml")
+            || c.startsWith("<?xml") || c.startsWith("<xml")),
+    PYTHON(SyntaxConstants.SYNTAX_STYLE_PYTHON, (n, c) -> n.endsWith(".py") || n.endsWith(".python")),
+    RUBY(SyntaxConstants.SYNTAX_STYLE_RUBY, (n, c) -> n.endsWith(".rb") || n.endsWith(".ruby")),
+    JAVA(SyntaxConstants.SYNTAX_STYLE_JAVA, (n, c) -> n.endsWith(".java")),
+    HTML(SyntaxConstants.SYNTAX_STYLE_HTML, (n, c) -> n.endsWith(".html")),
+    CSS(SyntaxConstants.SYNTAX_STYLE_CSS, (n, c) -> n.endsWith(".css")),
+    PROPERTIES(SyntaxConstants.SYNTAX_STYLE_PROPERTIES_FILE, (n, c) -> n.endsWith(".properties")
+            || n.endsWith(".mf") || n.endsWith(".sf")),
+    PHP(SyntaxConstants.SYNTAX_STYLE_PHP, (n, c) -> n.endsWith(".php") || c.startsWith("<?php")),
+    JS(SyntaxConstants.SYNTAX_STYLE_JAVASCRIPT, (n, c) -> n.endsWith(".js")),
+    BATCH(SyntaxConstants.SYNTAX_STYLE_WINDOWS_BATCH, (n, c) -> n.endsWith(".bat")),
+    SHELL(SyntaxConstants.SYNTAX_STYLE_UNIX_SHELL, (n, c) -> n.endsWith(".sh")),
+    C(SyntaxConstants.SYNTAX_STYLE_C, (n, c) -> n.endsWith(".c") || n.endsWith(".h")),
+    CPP(SyntaxConstants.SYNTAX_STYLE_CPLUSPLUS, (n, c) -> n.endsWith(".cpp") || n.endsWith(".hpp")),
+    SCALA(SyntaxConstants.SYNTAX_STYLE_SCALA, (n, c) -> n.endsWith(".scala")),
+    CLOJURE(SyntaxConstants.SYNTAX_STYLE_CLOJURE, (n, c) -> n.endsWith(".clojure")),
+    GROOVY(SyntaxConstants.SYNTAX_STYLE_GROOVY, (n, c) -> n.endsWith(".groovy") || n.endsWith(".gradle")),
+    LUA(SyntaxConstants.SYNTAX_STYLE_LUA, (n, c) -> n.endsWith(".lua")),
+    SQL(SyntaxConstants.SYNTAX_STYLE_SQL, (n, c) -> n.endsWith(".sql")),
+    JSON(SyntaxConstants.SYNTAX_STYLE_JSON, (n, c) -> n.endsWith(".json")),
+    JSP(SyntaxConstants.SYNTAX_STYLE_JSP, (n, c) -> n.endsWith(".jsp")),
+    YAML(SyntaxConstants.SYNTAX_STYLE_YAML, (n, c) -> n.endsWith(".yml") || n.endsWith(".yaml")),
+    CS(SyntaxConstants.SYNTAX_STYLE_CSHARP, (n, c) -> n.endsWith(".cs")),
+    CSV(SyntaxConstants.SYNTAX_STYLE_CSV, (n, c) -> n.endsWith(".csv")),
+    DOCKER(SyntaxConstants.SYNTAX_STYLE_DOCKERFILE, (n, c) -> n.endsWith(".dockerfile")),
+    DART(SyntaxConstants.SYNTAX_STYLE_DART, (n, c) -> n.endsWith(".dart")),
+    GO(SyntaxConstants.SYNTAX_STYLE_GO, (n, c) -> n.endsWith(".go")),
+    HTACCESS(SyntaxConstants.SYNTAX_STYLE_HTACCESS, (n, c) -> n.endsWith(".htaccess")),
+    INI(SyntaxConstants.SYNTAX_STYLE_INI, (n, c) -> n.endsWith(".ini")),
+    KOTLIN(SyntaxConstants.SYNTAX_STYLE_KOTLIN, (n, c) -> n.endsWith(".kt") || n.endsWith(".kts")),
+    LATEX(SyntaxConstants.SYNTAX_STYLE_LATEX, (n, c) -> n.endsWith(".tex")),
+    MARKDOWN(SyntaxConstants.SYNTAX_STYLE_MARKDOWN, (n, c) -> n.endsWith(".md")),
+    PERL(SyntaxConstants.SYNTAX_STYLE_PERL, (n, c) -> n.endsWith(".pl")),
+    TYPESCRIPT(SyntaxConstants.SYNTAX_STYLE_TYPESCRIPT, (n, c) -> n.endsWith(".ts")),
+    NONE(SyntaxConstants.SYNTAX_STYLE_NONE, (n, c) -> false);
+
+    public static final Language[] VALUES = values();
+
+    private final BiFunction<String, String, Boolean> criteria;
+
+    private final String syntaxConstant;
+
+    Language(String syntaxConstant, BiFunction<String, String, Boolean> criteria) {
+        this.criteria = criteria;
+        this.syntaxConstant = syntaxConstant;
+    }
+
+    public boolean isLanguage(String fileName, String content) {
+        return criteria.apply(fileName, content);
+    }
+
+    public String getSyntaxConstant() {
+        return syntaxConstant;
+    }
+
+    public static Language detectLanguage(String fileName, String content) {
+        for (Language lang : VALUES) {
+            if (lang.isLanguage(fileName, content)) {
+                return lang;
+            }
+        }
+        return NONE;
+    }
+
+}