"The current temporary cache is required for any update operation and only
contains data downloaded during the present aborted session.
The former cache might contain more complete information; if you do not want
to lose that information, you have to restore it and delete the current
cache.
This can easily be done here by erasing the hts-cache/new.* files]"

I am glad I am not the only one who have found this messgae confusing and
plainly not easily understandable. There are probably oodles of other people
who is wondering what this really means. Would it be possible to please have a
mortal (not a programmer, no offense!)rewrite this whole instruction? 

I see in another answer that one is advised not to close down the pc in in the
middle of mirroring a site, but this is not always possible, especially if the
site is large. Sometimes in life you just have to reboot, right?
Is it safe to assume that the following statement: "if you do not want to lose
that information, you have to restore it and delete the current cache. This
can easily be done here by erasing the hts-cache/new.* files]", means that if
I always delete any and all hts-cache/new.* files I will not risk losing any
files that are already downloaded?
I am thankful for your hard work on an otherwise great program.

Would it be possible to modify the program so that there is any and all
domnloaded files is simply added to the cache and that there is only one cache
file present at all times? This would once and for all remove all confusion
and misunderstandings.