diff --git a/src/main/java/org/harctoolbox/irscrutinizer/AboutPopup.java b/src/main/java/org/harctoolbox/irscrutinizer/AboutPopup.java
index 52d67203..39afb1ff 100644
--- a/src/main/java/org/harctoolbox/irscrutinizer/AboutPopup.java
+++ b/src/main/java/org/harctoolbox/irscrutinizer/AboutPopup.java
@@ -20,11 +20,13 @@
 import java.net.URI;
 import java.net.URISyntaxException;
 import org.harctoolbox.guicomponents.GuiUtils;
+import org.harctoolbox.ircore.ThisCannotHappenException;
 
 /**
  * The mandatory about popup ;-).
  *
  */
+@SuppressWarnings("serial")
 public final class AboutPopup extends javax.swing.JDialog {
 
     private GuiUtils guiUtils;
@@ -39,15 +41,21 @@ public final class AboutPopup extends javax.swing.JDialog {
     public AboutPopup(java.awt.Frame parent, boolean modal) {
         super(parent, modal);
         if (!(parent instanceof GuiMain))
-            throw new RuntimeException("Programming error");
+            throw new ThisCannotHappenException("Programming error");
 
         GuiMain guiMain = (GuiMain) parent;
         guiUtils = guiMain.getGuiUtils();
         irpTransmogrifierVersion = "IrpTransmogrifier version " + org.harctoolbox.irp.Version.version
-                + "; Database version " + guiMain.getIrpDatabase().getVersion();
+                + "; Database version ?";
         initComponents();
     }
 
+    public void setVersion(String irpDatabaseVersion) {
+        irpTransmogrifierVersion = "IrpTransmogrifier version " + org.harctoolbox.irp.Version.version
+                + "; Database version " + irpDatabaseVersion;
+        versionLabel2.setText(irpTransmogrifierVersion);
+    }
+
     /** This method is called from within the constructor to
      * initialize the form.
      * WARNING: Do NOT modify this code. The content of this method is
diff --git a/src/main/java/org/harctoolbox/irscrutinizer/GuiMain.java b/src/main/java/org/harctoolbox/irscrutinizer/GuiMain.java
index e201fa55..14884f1c 100755
--- a/src/main/java/org/harctoolbox/irscrutinizer/GuiMain.java
+++ b/src/main/java/org/harctoolbox/irscrutinizer/GuiMain.java
@@ -106,6 +106,7 @@
 import org.harctoolbox.remotelocator.NotFoundException;
 import org.xml.sax.SAXException;
 
+@SuppressWarnings("serial")
 public final class GuiMain extends javax.swing.JFrame {
 
     private final static String ISSUES_URL = "https://github.com/bengtmartensson/IrScrutinizer/issues";
@@ -225,14 +226,12 @@ public GuiMain(String applicationHome, String propsfilename, boolean verbose, Li
         loadLibraries();
         setupGuiUtils();
         setupTables();
-        setupIrpDatabase(); // must come before initComponents
+        setupIrpDatabaseAndDecoder(); // must come before initComponents
         setupImporters();
-        setupDecoder();
         loadExportFormats(); // must come before initComponents
         initComponents();
         if (!LircHardware.isLibraryLoaded())
             sendingHardwareTabbedPane.remove(devLircPanel);
-        girrImporter.setIrpRendererBean(irpMasterBean);
         tweakTables();
         tweakFrame();
         setupRepeatFinder();
@@ -253,7 +252,7 @@ public GuiMain(String applicationHome, String propsfilename, boolean verbose, Li
      * @throws IOException
      * @throws ParserConfigurationException
      * @throws SAXException
-     * @throws IrpParseException 
+     * @throws IrpParseException
      */
     GuiMain() throws IOException, ParserConfigurationException, SAXException, IrpParseException {
         this(System.getProperty("user.dir") + "/target");
@@ -339,18 +338,24 @@ private void setupTables() {
         tableUtils = new TableUtils(guiUtils);
     }
 
-    private void setupIrpDatabase() throws IOException, IrpParseException, SAXException {
+    private void setupIrpDatabaseAndDecoder() throws IOException, IrpParseException, SAXException {
         List<File> configFiles = new ArrayList<>(4);
         configFiles.add(new File(properties.mkPathAbsolute(properties.getIrpProtocolsPath())));
         String secondary = properties.getSecondaryIrpProtocolsPath();
         if (!secondary.isEmpty())
             configFiles.add(new File(secondary));
 
-        irpDatabase = new IrpDatabase(configFiles);
-        Command.setIrpDatabase(irpDatabase);
+        IrpDatabase newIrpDatabase = new IrpDatabase(configFiles);
         properties.addSecondaryIrpProtocolsPathChangeListener((String name1, Object oldValue, Object newValue) -> {
             secondaryRemoveMenuItem.setEnabled(!((String) newValue).isEmpty());
         });
+        setupIrpDatabaseAndDecoder(newIrpDatabase);
+    }
+
+    private void setupIrpDatabaseAndDecoder(IrpDatabase newIrpDatabase) throws IrpParseException {
+        irpDatabase = newIrpDatabase;
+        setupDecoder();
+        Command.setIrpDatabase(irpDatabase);
     }
 
     private void setupImporters() throws MalformedURLException, IrpParseException {
@@ -473,7 +478,7 @@ private void setupIctImporter() {
 
     private void setupGirrImporter() throws MalformedURLException {
         Command.setAcceptEmptyCommands(properties.getAllowEmptyGirrCommands());
-        girrImporter = new GirrImporter(properties.getGirrValidate(), new URL(properties.getGirrSchemaLocation()), irpDatabase);
+        girrImporter = new GirrImporter(properties.getGirrValidate(), new URL(properties.getGirrSchemaLocation()), this);
         properties.addGirrSchemaLocationChangeListener((String name1, Object oldValue, Object newValue) -> {
             try {
                 girrImporter.setUrl(new URL((String)newValue));
@@ -1452,7 +1457,7 @@ private void scrutinizeSignal() {
             guiUtils.error("Unspecified error: \"" + ex.getMessage() + "\", please report.");
         }
     }
-    
+
     /**
      * Invoke the decoding on the string given as argument.
      * Meant for testing only-
@@ -1485,10 +1490,6 @@ GuiUtils getGuiUtils() {
         return guiUtils;
     }
 
-    IrpDatabase getIrpDatabase() {
-        return this.irpDatabase;
-    }
-
     private void updateOutputFormat(OutputTextFormat format) {
         updateOutputFormat(format.ordinal());
     }
@@ -2148,6 +2149,19 @@ private void transformNameActionPerformed(javax.swing.JTable table, NamedIrSigna
         model.namesTransform(transformation, rows);
     }
 
+    public void patchProtocols(IrpDatabase newProtocols) {
+        if (newProtocols.isEmpty())
+            return;
+        irpDatabase.patch(newProtocols);
+        irpMasterBean.updateProtocols();
+        try {
+            setupDecoder();
+            Command.setIrpDatabase(irpDatabase);
+        } catch (IrpParseException ex) {
+            guiUtils.error(ex);
+        }
+    }
+
     /**
      * This method is called from within the constructor to initialize the form.
      * WARNING: Do NOT modify this code. The content of this method is always
@@ -7045,6 +7059,7 @@ private void aboutMenuItemActionPerformed(java.awt.event.ActionEvent evt) {//GEN
             aboutBox = new AboutPopup(this, false);
             aboutBox.setLocationRelativeTo(this);
         }
+        aboutBox.setVersion(irpDatabase.getVersion());
         aboutBox.setVisible(true);
     }//GEN-LAST:event_aboutMenuItemActionPerformed
 
@@ -8104,7 +8119,7 @@ private void irpProtocolsSelectMenuItemActionPerformed(java.awt.event.ActionEven
 
         properties.setIrpProtocolsPath(f.getAbsolutePath());
         try {
-            setupIrpDatabase();
+            setupIrpDatabaseAndDecoder();
         } catch (IOException | IrpParseException | SAXException ex) {
             guiUtils.error(ex);
         }
@@ -9183,7 +9198,7 @@ private void secondaryIrpProtocolsSelectMenuItemActionPerformed(java.awt.event.A
             guiUtils.message("Secondary IrpProtocol file set to " + f.getAbsolutePath() + ".");
         }
         try {
-            setupIrpDatabase();
+            setupIrpDatabaseAndDecoder();
         } catch (IOException | IrpParseException | SAXException ex) {
             guiUtils.error(ex);
         }
@@ -9205,7 +9220,7 @@ private void secondaryIrpProtocolsEditMenuItemActionPerformed(java.awt.event.Act
 
     private void irpProtocolsReloadMenuItemActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_irpProtocolsReloadMenuItemActionPerformed
         try {
-            setupIrpDatabase();
+            setupIrpDatabaseAndDecoder();
         } catch (IOException | IrpParseException | SAXException ex) {
             guiUtils.error(ex);
         }
diff --git a/src/main/java/org/harctoolbox/irscrutinizer/importer/GirrImporter.java b/src/main/java/org/harctoolbox/irscrutinizer/importer/GirrImporter.java
index ac33cdd8..e8435fe7 100644
--- a/src/main/java/org/harctoolbox/irscrutinizer/importer/GirrImporter.java
+++ b/src/main/java/org/harctoolbox/irscrutinizer/importer/GirrImporter.java
@@ -18,7 +18,6 @@
 package org.harctoolbox.irscrutinizer.importer;
 
 import java.io.File;
-import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.Reader;
@@ -35,10 +34,10 @@
 import org.harctoolbox.girr.Remote;
 import org.harctoolbox.girr.RemoteSet;
 import org.harctoolbox.girr.XmlStatic;
-import org.harctoolbox.guicomponents.IrpRenderBean;
 import org.harctoolbox.ircore.InvalidArgumentException;
 import org.harctoolbox.ircore.IrCoreUtils;
 import org.harctoolbox.irp.IrpDatabase;
+import org.harctoolbox.irscrutinizer.GuiMain;
 import org.harctoolbox.xml.XmlUtils;
 import org.w3c.dom.Document;
 import org.w3c.dom.Element;
@@ -51,22 +50,19 @@
  */
 public class GirrImporter extends RemoteSetImporter implements IReaderImporter {
     public static final String homeUrl = "http://www.harctoolbox.org/girr";
-
     private static final Logger logger = Logger.getLogger(GirrImporter.class.getName());
 
     private transient Schema schema;
     private URL url;
     private boolean validate;
-    private final IrpDatabase irpDatabase;
-    //private final Set<String>accumulatedProtocols = new HashSet<>(4);
-    private IrpRenderBean irpMasterBean;
+    private final GuiMain guiMain;
 
-    public GirrImporter(boolean validate, URL url, IrpDatabase irpDatabase) {
+    public GirrImporter(boolean validate, URL url, GuiMain guiMain) {
         super();
         schema = null;
         this.url = url;
         this.validate = validate;
-        this.irpDatabase = irpDatabase;
+        this.guiMain = guiMain;
     }
 
     /**
@@ -231,32 +227,13 @@ public String getFormatName() {
         return "Girr";
     }
 
-    public RemoteSet getRemoteSet(File file) throws IOException, FileNotFoundException, ParseException, InvalidArgumentException {
+    public RemoteSet getRemoteSet(File file) throws IOException, ParseException, InvalidArgumentException {
         possiblyZipLoad(file, IrCoreUtils.UTF8_NAME);
         return remoteSet;
     }
 
     private void accumulateProtocols(String origin) {
         IrpDatabase newProtocols = remoteSet.getIrpDatabase();
-        // This for branch IrpTransmogrifier/setProtocolDocumentation, i.e. IrpTransmogrifier 1.3.*
-//        for (NamedProtocol p : newProtocols) {
-//            DocumentFragment doc = p.getDocumentation();
-//            if (doc == null) {
-//                try {
-//                    newProtocols.setDocumentation(p.getName(), "Protocol imported from " + origin);
-//                } catch (UnknownProtocolException ex) {
-//                    throw new ThisCannotHappenException(ex);
-//                }
-//            }
-//        }
-        if (!newProtocols.isEmpty()) {
-//            accumulatedProtocols.addAll(newProtocols.getKeys());
-            irpDatabase.patch(newProtocols);
-            irpMasterBean.updateProtocols();
-        }
-    }
-
-    public void setIrpRendererBean(IrpRenderBean irpMasterBean) {
-        this.irpMasterBean = irpMasterBean;
+        guiMain.patchProtocols(newProtocols);
     }
 }