Please add a possibility to delete the .htaccess file in the folder wp-snapshots without ftp access. Today I tried to duplicate a wordpress installation, which ran into an internal server error (didn't support Options -Indexes). Using version 0.5.2 of your plugin, I had to disable line 196 in classes/utility.php and reupload the plugin.
Greats from Germany and thanks for this great plugin
LeisureLarry