Update app.py

app.py

@@ -87,7 +87,7 @@ class ChatModel:
             # Check if we need to load a new store
             if self.current_store != store_name:
                 logger.info(f"Loading new vector store: {store_name}")
-                vector_store_path = f"vector-stores/{store_name}"
+                vector_store_path = f"vector_stores_index/{store_name}"
                 
                 if not os.path.exists(vector_store_path):
                     raise ValueError(f"Vector store not found at: {vector_store_path}")