Sometimes, I get the message "Unable to continue old downloads", mostly after electrical shock or sth else that
forces the computer to shut down immidiately.
Then all the threads to be downloaded go away and I
cant continue the progress as it drops to %0.

Can it be such a feature to continue old downloads?
In such cases, downloads.bak file does not seem
to work.

For example; a half-downloaded file may be checked and
downloads.dat recontructed according to the
mark in the half file or sth else?