You can go to options from the control bar of ShowMore screen recorder, then hit the settings icon next to output directory. After that, you can hit to open the temporary folder to find your unsaved temp video and audio files. Next, you can launch the built-in video editor, add the temp video file to the video editor, then drop down audio menu of the added video and select “Add audio…”. Once it’s done, you can add the temp audio file and hit “Convert” button to recover this recording.
If it still fails to work, you can open ShowMore screen recorder, hit the quotation mark on the toolbar, then check “Send log file” in the pop-up feedback window. Besides, you can also write down some details of this issue, and submit it.