If you did not name your topic.topx then Look for topic.topx
in the topic window hold the ctrl key down and right click then open
please also confirm that you are speaking about a topic file which is under the topic note tab and not a notx file which is under the study note tab
They are not there they are completely gone, each topic was named a specific name and before this download would appear in the drop down box, but now after the download they are completely gone, not in the drop down box, not in windows explorer and not under topic.topx