I have a workflow that I used for testing/goofing around and I'd like to delete it.  It says there are files in it so I can't delete it.

I searched for files that are, or have ever been in that workflow, and the search came up empty.

I destroyed everything that was deleted previously.

Still it says there are files in the workflow...

I checked the tables with SSMS and found records that certain files are (or were) in that workflow.

I looked for those files in the vault, and found no trace of them...

Suggestions?