I've already done that and the software has finished creating the sitemap.
But this is not a practical way and as I said before, most of the times when the crawling is working it shows no information. I had to stop and continue the crawling multiple times till the sitemap was created.
I am not quite sure about the accuracy of this software, as it stopped multiple times for no reason and the number of broken links is different than google webmaster tools.
You should tell people that your software doesn't work on windows machines, or you should fix these bugs in your software.
It's kind of pathetic comparing how do you promote your software, showing all these good testimonials with your answer of " running the generator multiple times" ! Well, when I pay for a software I expect a fully working software.
Anyway, I'll search for other softwares for creating sitemaps.
Good luck with your business. I hope you fix the bugs of your software in the future, or at least be honest with your customers by telling them that the software has some problems!