Hi dewgirl,
You know the output of that package isn't going to guarantee your acceptance at any universities, right? I think it maybe a better idea to contact supervisors directly from the department that you wan't to get into and they'll let you know if your grades are good enough for admission. But if you want to have some idea on how your grades will convert to the US/Canadian grading system, I guess it's worth a try. I did mine manually though. Good luck!