I attempted to download files to an unlinked computer. The zipped folder that was created on the computer was invalid (empty). All the files that I had downloaded (~1.75 GB) were still in Dropbox, so I deleted the computer folder to try again with fewer files. When the computer folder was deleted, all the files in Dropbox also deleted. They are not showing up in Dropbox's Deleted Files or in Events and they have been permanently deleted from the computer. How do I recover them?