Thanks for the response, and also I'm not good at English and grammar as well.
I'm using this for reference purposes (despite its a simulation). And I was looking for more, but I notice that there is a limited use of a program/simulation, like 3 uses (above the summary results) and its over. Is there a reason why? And because of limited usage of the program, can I use it on the next day?
PS: I'm not an IT expert but this program/simulation is very good. :)