Why give 302 error when download a HTTP file? 

Because the URL has been moved to other site. Please use new URL which DLExpert gives in status coloum to download again. 

Why error when connect Microsoft proxy? 

DLExpert don’t support MS proxy at present, because MS proxy request NT authority method. Only IE support this method.

Why rate is down after finish 96%? 

After finish 96%,some threads finish their jobs and quit , so rate is down. You can use “split method” to avoid it. 

Why downloaded zip file has CRC error? 

This is a BUG. Version 0.58 correct it. 

Why DLExpert report “Can’t save file”?

Maybe your saving folder does not exist, free parental control software or not writable.