If you have deleted files off from your USB drive then you can recover your files from your USB stick with this program. The USB Show software does not need to be installed and it will recover your files. You might note that there are no real options with this software.
If you want to recover your files from your USB drive, stick and a camera then you will want to download Disk Digger which has also been added below. These programs do not need to be installed and will simply run when you click on the file.