I'm curious as to what logic HTTrack uses to replace a file
when it does an update.  Does it do some sort of CRC/hash on
a file, does it just check the date/timestamp and/or
filesize, etc.?
Also, when updating a file, am I correct in assuming that
HTTrack will overwrite the entire file lying on disk
replacing it with the new data it downloaded?
Any explanation of these points would be appreciated;
thanks, and thanks for a great program.