Suppose the following situation :

page1.html has links to 004.mp3, 003.mp3, page2.html
page2.html has links to 002.mp3, 001.mp3

These have all been downloaded
After a while mp3 are added and they are shifted on the pages :

page1.html has links to 006.mp3, 005.mp3, page2.html
page2.html has links to 004.mp3, 003.mp3, page3.html
page3.html has links to 002.mp3, 001.mp3

When the site is updated, will all mp3 be re-downloaded by WinHTTrack ?