fixed extra iteration while uploading new files

app.py

@@ -261,7 +261,7 @@ if colorizer is not None:
         st.experimental_rerun()  # Force rerun to reload the file_uploader object with new key
     
     # If session state is not empty, we will process stored images
-    if not st.session_state['uploaded_files']:
+    if st.session_state['uploaded_files']:
         if len(uploaded_files) == 1:
             display_single_image(uploaded_files[0], st.session_state.max_img_size)
         elif len(uploaded_files) > 1: