large tmp files files stored in uploads/wpclone_backup_xxx

I’m updating a site for a client. There are several very large tmp files with the naming convention “wpclone_backup_Jan_2018…tmp”. These are all directly in the uploads folder, not within a wp-clone folder.

Is this an old storage convention for this plugin? Is there any way I can delete these files with the current version of the plugin? I don’t have FTP access right now unfortunately. And the plugin interface is only looking for backup files within the uploads/wp-clone folder so it’s not finding these other backups.

Thanks for your help!