diff --git a/cmd/WiiUDownloader/mainwindow.go b/cmd/WiiUDownloader/mainwindow.go
index 3393963..46ac816 100644
--- a/cmd/WiiUDownloader/mainwindow.go
+++ b/cmd/WiiUDownloader/mainwindow.go
@@ -165,6 +165,24 @@ func (mw *MainWindow) ShowAll() {
 	if err != nil {
 		log.Fatal("Unable to create box:", err)
 	}
+	menuBar, _ := gtk.MenuBarNew()
+	toolsSubMenu, _ := gtk.MenuNew()
+
+	toolsMenu, _ := gtk.MenuItemNewWithLabel("Tools")
+	decryptContentsMenuItem, _ := gtk.MenuItemNewWithLabel("Decrypt contents")
+	decryptContentsMenuItem.Connect("activate", func() {
+		mw.progressWindow, err = wiiudownloader.CreateProgressWindow(mw.window)
+		if err != nil {
+			return
+		}
+		mw.progressWindow.Window.ShowAll()
+		go mw.onDecryptContentsMenuItemClicked()
+	})
+	toolsSubMenu.Append(decryptContentsMenuItem)
+
+	toolsMenu.SetSubmenu(toolsSubMenu)
+	menuBar.Append(toolsMenu)
+	mainvBox.PackStart(menuBar, false, false, 0)
 	tophBox, err := gtk.BoxNew(gtk.ORIENTATION_HORIZONTAL, 0)
 	if err != nil {
 		log.Fatal("Unable to create box:", err)
@@ -329,6 +347,17 @@ func (mw *MainWindow) onCategoryToggled(button *gtk.ToggleButton) {
 	button.Activate()
 }
 
+func (mw *MainWindow) onDecryptContentsMenuItemClicked() {
+	selectedPath, err := dialog.Directory().Title("Select the path to decrypt").Browse()
+	if err != nil {
+		return
+	}
+
+	wiiudownloader.DecryptContents(selectedPath, &mw.progressWindow, false)
+
+	mw.progressWindow.Window.Close()
+}
+
 func (mw *MainWindow) onSelectionChanged() {
 	selection, err := mw.treeView.GetSelection()
 	if err != nil {
diff --git a/decryption.go b/decryption.go
index 43211c6..592540c 100644
--- a/decryption.go
+++ b/decryption.go
@@ -22,7 +22,7 @@ var (
 	decryptionError = false
 )
 
-func decryptContents(path string, progress *ProgressWindow, deleteEncryptedContents bool) error {
+func DecryptContents(path string, progress *ProgressWindow, deleteEncryptedContents bool) error {
 	wg.Add(1)
 	progressInt := 1
 	go runDecryption(path, &progressInt, deleteEncryptedContents)
diff --git a/downloader.go b/downloader.go
index 5769977..e3e5b5c 100644
--- a/downloader.go
+++ b/downloader.go
@@ -242,7 +242,7 @@ func DownloadTitle(titleID string, outputDirectory string, doDecryption bool, pr
 	}
 
 	if doDecryption && !progressWindow.cancelled {
-		if err := decryptContents(outputDir, progressWindow, deleteEncryptedContents); err != nil {
+		if err := DecryptContents(outputDir, progressWindow, deleteEncryptedContents); err != nil {
 			return err
 		}
 	}