This must be a good tool based on the postings, but it crashes when I launched it on x64 Windows.
This is a common programming defect. If your application binds on 32-bit specific things, you must compile the .NET project with x86 switch so it runs in 32 bit mode on Windows x64. Otherwise, it will crash without a hint to ordinary people.
Right now I am using this hack
http://stackoverflow.com/questions/256287/how-do-i-run-partcover-in-x64-windows
but hope the author of this tool can pay attention to this and release a new version.
Regards,