To delete stubborn files permanently:
Unlock Delete All Permanently button by clicking on the padlock button on the left of the sheet.
This is a precaution against accidentally clicking the Delete All Permanently button and removing all stubborn files unintentionally.
Click Delete All Permanently button to have Decloner go through the list of stubborn files and attempt to delete each of them permanently.
Deleted files are removed from the list. If any files remain after Decloner is finished, this means the remaining files could not be deleted. The most likely cause is insufficient permissions, locked files or a read-only disk.
To make Decloner stop deleting stubborn files, click Stop button while the progress indicator is displayed.