Once I had about 3 million instances created by a rogue BOBJ server.
I needed to remove these instances but could not swallow the idea of clicking "delete" on each one.
I created this program in under two hours to do the work for me. Its not perfect by a long shot, its a quick and dirty utility like many others that i make. As long as it does the job, i'm ok with the ugly design.
You will need Microsoft Visual Studio 2010 and have the BOBJ .NET SDK library installed.
Download from BOBJ instance delete utility