Based on the developer's description and app's features, your files are not deleted. They're stored on the internal or external partition. However, chances drop for the files stored on the internal partition. The reset operation wiped all those files. My advice is to re-install the application and use the built-in features to try to restore the files, because they're hidden somewhere. If you require additional help, contact the developer using the following email address: file.hide.expert+fhe@gmail.com