I'm not sure if this is a Newsbin problem or a Windows 7 problem.
I go to clean out my download directories once a week or so. I get rid of the old files that are still there ( pars, rars, info, ... ) things like that and nb2 files for things I decide I did not want after they started to download. The only way I can remove the nb2 files is to shutdown newsbin. I get the error message about the file being used by newsbin so it can't be delete.
Thanks and I do not think this is a buggy piece of sh!t.