CCleaner's command line secure delete and Sandboxie

As noted on this Sandboxie thread http://sandboxie.com/phpbb/viewtopic.php?p=31262#31262, there's a problem using CCleaner's command line with Sandboxie to execute secure deletions. I tested this out last night and, as mentioned by Guest10's post (4th one from the top), the files in the applicable sandbox are deleted but the (renamed) sandbox folder is left behind. If I recall correctly, that renamed, left-behind sandbox folder looked something like this in Windows Explorer: __Delete_(sandbox name).

I know you can configure Sandboxie for automatic, secure deletions using SDelete and Eraser. I'd prefer not to have to install either of those programs since I already use CCleaner.

Suggestions?