I have one problem. I use a Wlan and the carrier goes down
really often breaking the connection. This messes up
WinHTTrack. All the downloads that were interrupted become
corrupted. This means than only parts of the files are being
saved to the local disk. 

Is the a way to activate a feature that when this happens
HTTrack automatically compares the size of files on the
server to the local ones and then resumes or begins their
downloads again if necessary?