How do programs like Internet Download Manager resume a download from a new URL? I think that it may store the original URL of the page in which the download link found and opens that page to refresh the download URL. Is it so?
What do you mean by "refresh expired URL"?
Currently am downloading a file in idm and now I have paused the download. After, say 3 hours am resuming the same download and the URL has been expired. IDM couldn't continue the download and it takes me to the original webpage where the download link exist saying please wait while refreshing the URL and now I have to click the download link again and IDM catches the new URL. Now it resumes the download from new URL.