Yes, the .zip file is completly locked. No one can delete it remotely, locally, or using command line commands (del, deltree, etc). The Cron job shows it is awaiting another execution so it is not actively doing anything, but someone has to log onto the server to actually stop the cron service itself to make the file able to be moved out or deleted and then replaced with a different version to get the new file trigger to pick it up again.