When using this app there are a few files and folders generated.
In the same directory as the jar config.properties is generated. This holds the names of the files you want to play. These options can also be configured through the Sound Setup menu item.
All files you want to play must be copied into the same directory as the jar. Then you must put the names of the files into the Sound Setup window.
The files are copied into the a folder called "lock" while in use. This folder is auto generated.