Update app.py

app.py

@@ -158,7 +158,7 @@ def updateCategoryOptions(resultIndex):
     #st.info(f"After update: {st.session_state.categorySelect}")
 
 def updateMultiSelect():
-    currFileIndex = file_names.index(st.session_state["select_currFile"])
+    currFileIndex = st.session_state.file_names.index(st.session_state["select_currFile"])
     st.session_state.resetResult = True
     for i, category in enumerate(st.session_state['categories']):
         st.session_state[f'multiselect_{category}'] = st.session_state['categorySelect'][currFileIndex][i]