diff --git a/src/events.ts b/src/events.ts
index 10174e1..8701075 100644
--- a/src/events.ts
+++ b/src/events.ts
@@ -1283,11 +1283,7 @@ class AddonEvents extends AddonBase {
       /*
         message.content = {}
       */
-      window.open(
-        "chrome://Knowledge4Zotero/content/template.xul",
-        "_blank",
-        "chrome,extrachrome,centerscreen,width=800,height=400,resizable=yes"
-      );
+      this._Addon.template.openEditor();
     } else if (message.type === "export") {
       /*
         message.content = {
diff --git a/src/template.ts b/src/template.ts
index 49012e1..99f5f72 100644
--- a/src/template.ts
+++ b/src/template.ts
@@ -67,6 +67,18 @@ class AddonTemplate extends AddonBase {
     ];
   }
 
+  openEditor() {
+    if (this._window && !this._window.closed) {
+      this._window.focus();
+    } else {
+      window.open(
+        "chrome://Knowledge4Zotero/content/template.xul",
+        "_blank",
+        "chrome,extrachrome,centerscreen,width=800,height=400,resizable=yes"
+      );
+    }
+  }
+
   initTemplates(_window: Window) {
     this._window = _window;
     this.updateTemplateView();