Download lisy.exe.txt from https://github.com/Lapyl/Lisy or
            https://lipy.us/docs to your local folder.
            Remove .txt from the end of the downloaded file's name.
            If you want, you may add a shortcut of your local lisy.exe file.
            When needed, click lisy.exe (or its shortcut).
            For listing contents of a folder, fetch or write the folder's path
            in the Source folder box, and click List button. It will add two csv
            files of lists, in the folder.
            For backing up a folder A to another folder B, [carefully] fetch or
            write A's path in the Source folder box and fetch or write B's path
            in the Backup folder box, and click Sync button.
            For a slideshow of image files from a folder, fetch or write the
            folder's path in the Source folder box, and click Show button. Close
            the app, when done.