[Plugin: WordPress Backup to Dropbox] Plugin Deactivated

Hi – I installed and activated the plugin and all was going fine – backed up 1100+ files before it stalled. This is the error I received: “The plugin wordpress-backup-to-dropbox/wp-backup-to-dropbox.php has been deactivated due to an error: Plugin file does not exist.”

Any suggestions?

http://ww.wp.xz.cn/extend/plugins/wordpress-backup-to-dropbox/