I have noticed this topic has been covered before,
but no solutions have been discovered as I see.

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.
RESUME works for only files that are known how much
percent have been downloaded. However in such cases
like electrical shock the file where records kept become corrupted.
I find out that the back up file (downloads.bak file on the disk which is a back up file (I think) for the records) have become corrupted too.
As a result;
I had dozens of half downloaded parts, HELP pLS!!

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