If the software is generating its own file names, it means the original file names are not (generally) recoverable - from the FAQ:
Will UFS Explorer restore the original folder structure and file names?
UFS Explorer is equipped with algorithms that allow it to restore the structure of the file system and the actual file names. Yet, in some cases, the original folder structure may undergo irreversible corruption becoming unrecoverable, and on top of that, some types of file systems tend to erase the original file names after certain operations (deletion, formatting, etc.). Under such circumstances, the folder or name for the file will be assigned by the software itself to keep the data recovery possible.