diff --git a/package.json b/package.json
index 781b060..f02e88e 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
   },
   "homepage": "https://github.com/windingwind/zotero-addon-template#readme",
   "dependencies": {
-    "zotero-plugin-toolkit": "^0.0.1"
+    "zotero-plugin-toolkit": "^0.0.2"
   },
   "devDependencies": {
     "@types/node": "^18.7.20",
@@ -40,4 +40,4 @@
     "release-it": "^14.14.0",
     "zotero-types": "^0.0.8"
   }
-}
+}
\ No newline at end of file
diff --git a/src/views.ts b/src/views.ts
index 95c73a2..449bf03 100644
--- a/src/views.ts
+++ b/src/views.ts
@@ -56,11 +56,16 @@ class AddonViews extends AddonModule {
       label: "Addon Template: File Menuitem",
       oncommand: "alert('Hello World! File Menuitem.')",
     });
+
+    // Initialize extra columns
+    this._Addon.toolkit.ItemTree.registerExample();
   }
 
   public unInitViews() {
     this._Addon.toolkit.Tool.log("Uninitializing UI");
     this._Addon.toolkit.UI.removeAddonElements();
+    // Remove extra columns
+    this._Addon.toolkit.ItemTree.unregister("test");
   }
 
   public showProgressWindow(