Hello,
did you modify "Exclude URLs" or "Do not parse" settings in generator config? If yes, what are the values you did set?
> - My second problem was, is there a way that all the link that haven't changed are not crawled each time, because now my crawling is 7hours long.
Unfortunately, generator will have no way to find if pages were actually changed unless they crawl them, so it only could work if you know the URLs (or parts of URLs) for those pages and add them in "Do not parse" setting in generator configuration.