diff --git a/src/main/java/ai/nets/samj/gui/ImageSelection.java b/src/main/java/ai/nets/samj/gui/ImageSelection.java
index 6eb874d..eac5a49 100644
--- a/src/main/java/ai/nets/samj/gui/ImageSelection.java
+++ b/src/main/java/ai/nets/samj/gui/ImageSelection.java
@@ -70,9 +70,10 @@ public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
 	public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
 		try {
 			ComboBoxItem item = (ComboBoxItem) this.cmbBox.getSelectedItem();
-			if (selected != item) {
+			if (selected == null || selected.getId().equals(item.getId())) {
 				listener.modelActionsOnImageChanged();
 				listener.imageActionsOnImageChanged();
+				selected = item;
 			}
 		} catch (Exception ex) {
 			ex.printStackTrace();
diff --git a/src/main/java/ai/nets/samj/gui/MainGUI.java b/src/main/java/ai/nets/samj/gui/MainGUI.java
index 21250d9..9888528 100644
--- a/src/main/java/ai/nets/samj/gui/MainGUI.java
+++ b/src/main/java/ai/nets/samj/gui/MainGUI.java
@@ -189,6 +189,7 @@ private void loadModel() {
 
     private void close() {
         cmbModels.unLoadModel();
+        this.drawerPanel.interruptThreads();
     }
 
     // Method to create the title panel
diff --git a/src/main/java/ai/nets/samj/gui/components/ComboBoxItem.java b/src/main/java/ai/nets/samj/gui/components/ComboBoxItem.java
index 8fca2b9..7e83201 100644
--- a/src/main/java/ai/nets/samj/gui/components/ComboBoxItem.java
+++ b/src/main/java/ai/nets/samj/gui/components/ComboBoxItem.java
@@ -20,6 +20,8 @@
 package ai.nets.samj.gui.components;
 
 
+import java.util.UUID;
+
 import net.imglib2.RandomAccessibleInterval;
 import net.imglib2.type.NativeType;
 import net.imglib2.type.numeric.RealType;
@@ -31,7 +33,7 @@
  * @author CArlos Garcia
  */
 public abstract class ComboBoxItem {
-    final private int id;
+    final private String id;
     final private Object value;
     private static final String SELECT_IMAGE_STR = "Select image";
 
@@ -43,9 +45,8 @@ public abstract class ComboBoxItem {
      * @param seq
      * 	the object
      */
-    public ComboBoxItem(int uniqueID, Object seq) {
-    	if (uniqueID == -1) throw new IllegalArgumentException("The unique identifier cannot be -1.");
-        this.id = uniqueID;
+    public ComboBoxItem(Object seq) {
+        this.id = UUID.randomUUID().toString();
         this.value = seq;
     }
 
@@ -54,7 +55,7 @@ public ComboBoxItem(int uniqueID, Object seq) {
      * In this case it is empty, the unique identifier will by -1.
      */
     public ComboBoxItem() {
-        this.id = -1;
+        this.id = "-1";
         this.value = null;
     }
 
@@ -62,7 +63,7 @@ public ComboBoxItem() {
      * 
      * @return the unique identifier of the instance
      */
-    public int getId() {
+    public String getId() {
         return id;
     }
 
diff --git a/src/main/java/ai/nets/samj/gui/components/ModelDrawerPanel.java b/src/main/java/ai/nets/samj/gui/components/ModelDrawerPanel.java
index 029c912..8461f8d 100644
--- a/src/main/java/ai/nets/samj/gui/components/ModelDrawerPanel.java
+++ b/src/main/java/ai/nets/samj/gui/components/ModelDrawerPanel.java
@@ -181,6 +181,7 @@ public void actionPerformed(ActionEvent e) {
 	
 	private void installModel() {
 		SwingUtilities.invokeLater(() -> listener.setGUIEnabled(false));
+		SwingUtilities.invokeLater(() -> install.setEnabled(false));
 		modelInstallThread = new Thread(() ->{
 			try {
 				this.html.clear();
@@ -292,6 +293,7 @@ private static String formatHTML(String html) {
 	
 	private void uninstallModel() {
 		SwingUtilities.invokeLater(() -> listener.setGUIEnabled(false));
+		SwingUtilities.invokeLater(() -> uninstall.setEnabled(false));
 	    startLoadingAnimation("Uninstalling model");
 		modelInstallThread = new Thread(() ->{
 			this.model.getInstallationManger().uninstall();
@@ -339,7 +341,7 @@ private void stopLoadingAnimation() {
 	}
 
 	
-	private void interruptThreads() {
+	public void interruptThreads() {
 		if (infoThread != null)
 			this.infoThread.interrupt();
 		if (installedThread != null)