The tool is just doing it’s job, once done you can delet it from wherever you save it unless its just a run tool which doesn’t save to your computer anyway, been ages since iv had to use it.
You can look though program files and program data and users/your name/appdata/roaming to double check that the leftovers have been deleted.
You might also find some leftovers of some other old programs you may of removed in there also.