diff --git a/lib/jsyntaxpane-0.9.5.jar b/lib/jsyntaxpane-0.9.5.jar
index 35613c063..753cec999 100644
Binary files a/lib/jsyntaxpane-0.9.5.jar and b/lib/jsyntaxpane-0.9.5.jar differ
diff --git a/libsrc/jsyntaxpane/jsyntaxpane/src/main/java/jsyntaxpane/syntaxkits/PlainDebugSyntaxKit.java b/libsrc/jsyntaxpane/jsyntaxpane/src/main/java/jsyntaxpane/syntaxkits/PlainDebugSyntaxKit.java
new file mode 100644
index 000000000..872b4b46f
--- /dev/null
+++ b/libsrc/jsyntaxpane/jsyntaxpane/src/main/java/jsyntaxpane/syntaxkits/PlainDebugSyntaxKit.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2008 Ayman Al-Sairafi ayman.alsairafi@gmail.com
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); 
+ * you may not use this file except in compliance with the License. 
+ * You may obtain a copy of the License 
+ *       at http://www.apache.org/licenses/LICENSE-2.0 
+ * Unless required by applicable law or agreed to in writing, software 
+ * distributed under the License is distributed on an "AS IS" BASIS, 
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
+ * See the License for the specific language governing permissions and 
+ * limitations under the License.  
+ */
+package jsyntaxpane.syntaxkits;
+
+import jsyntaxpane.DefaultSyntaxKit;
+import jsyntaxpane.lexers.EmptyLexer;
+
+/**
+ *
+ * @author JPEXS
+ */
+public class PlainDebugSyntaxKit extends DefaultSyntaxKit {
+
+    public PlainDebugSyntaxKit() {
+        super(new EmptyLexer());
+    }
+}
diff --git a/libsrc/jsyntaxpane/jsyntaxpane/src/main/resources/META-INF/services/jsyntaxpane/kitsfortypes.properties b/libsrc/jsyntaxpane/jsyntaxpane/src/main/resources/META-INF/services/jsyntaxpane/kitsfortypes.properties
index ab9b02f62..c1f30633d 100644
--- a/libsrc/jsyntaxpane/jsyntaxpane/src/main/resources/META-INF/services/jsyntaxpane/kitsfortypes.properties
+++ b/libsrc/jsyntaxpane/jsyntaxpane/src/main/resources/META-INF/services/jsyntaxpane/kitsfortypes.properties
@@ -24,6 +24,7 @@ text/xpath=jsyntaxpane.syntaxkits.XPathSyntaxKit
 text/xhtml=jsyntaxpane.syntaxkits.XHTMLSyntaxKit
 text/lua=jsyntaxpane.syntaxkits.LuaSyntaxKit
 text/plain=jsyntaxpane.syntaxkits.PlainSyntaxKit
+text/plaindebug=jsyntaxpane.syntaxkits.PlainDebugSyntaxKit
 text/flasm3=jsyntaxpane.syntaxkits.Flasm3SyntaxKit
 text/flasm3methodinfo=jsyntaxpane.syntaxkits.Flasm3MethodInfoSyntaxKit
 text/flasm=jsyntaxpane.syntaxkits.FlasmSyntaxKit
diff --git a/libsrc/jsyntaxpane/jsyntaxpane/src/main/resources/META-INF/services/jsyntaxpane/syntaxkits/plaindebugsyntaxkit/config.properties b/libsrc/jsyntaxpane/jsyntaxpane/src/main/resources/META-INF/services/jsyntaxpane/syntaxkits/plaindebugsyntaxkit/config.properties
new file mode 100644
index 000000000..212bacef2
--- /dev/null
+++ b/libsrc/jsyntaxpane/jsyntaxpane/src/main/resources/META-INF/services/jsyntaxpane/syntaxkits/plaindebugsyntaxkit/config.properties
@@ -0,0 +1,19 @@
+#
+# Plain / Empty Document
+#
+Components = jsyntaxpane.components.LineNumbersBreakpointsRuler
+PopupMenu = \
+  cut-to-clipboard     , \
+  copy-to-clipboard    , \
+  paste-from-clipboard , \
+  -                    , \
+  select-all           , \
+  -                    , \
+  undo                 , \
+  redo                 , \
+  -                    , \
+  find                 , \
+  find-next            , \
+  goto-line            , \
+  -                    , \
+  complete-word
diff --git a/src/com/jpexs/decompiler/flash/gui/editor/UndoFixedEditorPane.java b/src/com/jpexs/decompiler/flash/gui/editor/UndoFixedEditorPane.java
index 77f6bbb73..06237fe73 100644
--- a/src/com/jpexs/decompiler/flash/gui/editor/UndoFixedEditorPane.java
+++ b/src/com/jpexs/decompiler/flash/gui/editor/UndoFixedEditorPane.java
@@ -88,37 +88,42 @@ public class UndoFixedEditorPane extends JEditorPane {
     }
 
     public void changeContentType(String type) {
-        if (!type.equals(getContentType())) {
-            removeDocumentListener();
-            Font oldFont = getFont();
-            setContentType(type);
-            setFont(oldFont);
-            addDocumentListener();
-        }
+        View.execInEventDispatch(new Runnable() {
+            @Override
+            public void run() {
+                if (!type.equals(getContentType())) {
+                    removeDocumentListener();
+                    Font oldFont = getFont();
+                    setContentType(type);
+                    setFont(oldFont);
+                    addDocumentListener();
+                }
 
-        if (!Configuration.autoCloseQuotes.get()) {
-            getActionMap().remove("quotes");
-            KeyStroke ks = KeyStroke.getKeyStroke("typed '");
-            getInputMap(JTextComponent.WHEN_FOCUSED).remove(ks);
-        }
+                if (!Configuration.autoCloseQuotes.get()) {
+                    getActionMap().remove("quotes");
+                    KeyStroke ks = KeyStroke.getKeyStroke("typed '");
+                    getInputMap(JTextComponent.WHEN_FOCUSED).remove(ks);
+                }
 
-        if (!Configuration.autoCloseDoubleQuotes.get()) {
-            getActionMap().remove("double-quotes");
-            KeyStroke ks = KeyStroke.getKeyStroke("typed \"");
-            getInputMap(JTextComponent.WHEN_FOCUSED).remove(ks);
-        }
+                if (!Configuration.autoCloseDoubleQuotes.get()) {
+                    getActionMap().remove("double-quotes");
+                    KeyStroke ks = KeyStroke.getKeyStroke("typed \"");
+                    getInputMap(JTextComponent.WHEN_FOCUSED).remove(ks);
+                }
 
-        if (!Configuration.autoCloseBrackets.get()) {
-            getActionMap().remove("brackets");
-            KeyStroke ks = KeyStroke.getKeyStroke("typed [");
-            getInputMap(JTextComponent.WHEN_FOCUSED).remove(ks);
-        }
+                if (!Configuration.autoCloseBrackets.get()) {
+                    getActionMap().remove("brackets");
+                    KeyStroke ks = KeyStroke.getKeyStroke("typed [");
+                    getInputMap(JTextComponent.WHEN_FOCUSED).remove(ks);
+                }
 
-        if (!Configuration.autoCloseParenthesis.get()) {
-            getActionMap().remove("parenthesis");
-            KeyStroke ks = KeyStroke.getKeyStroke("typed (");
-            getInputMap(JTextComponent.WHEN_FOCUSED).remove(ks);
-        }
+                if (!Configuration.autoCloseParenthesis.get()) {
+                    getActionMap().remove("parenthesis");
+                    KeyStroke ks = KeyStroke.getKeyStroke("typed (");
+                    getInputMap(JTextComponent.WHEN_FOCUSED).remove(ks);
+                }
+            }
+        });
     }
 
     @Override
@@ -139,7 +144,11 @@ public class UndoFixedEditorPane extends JEditorPane {
             if (!t.equals(getText())) {
                 boolean plain = t.length() > Configuration.syntaxHighlightLimit.get();
                 if (plain) {
-                    contentType = "text/plain";
+                    if (this instanceof DebuggableEditorPane) {
+                        contentType = "text/plaindebug";
+                    } else {
+                        contentType = "text/plain";
+                    }
                     originalContentType = getContentType();
                     changeContentType(contentType);
                 } else if (originalContentType != null) {