> after backing up my.opera blog, I realized that all
> entries online are gone! Obiviously httrack didnt
> just copy the blog, but also activated the "delete"
> function within the blog!

If you had a url link that deletes entries, then any spider (google) or any
hacker would delete all entries.
Most login/logout/delete/edit-submit are forms and robots so not click on
forms.

> Now my backup contains the new deleted blog and
> photos I didnt backup last time.
A mirror is NOT a backup, it is a static snapshot in time. There is no server
side code, sql, database etc.
A backup is done by the private webmaster side, not the public side.

> I found a zip.file within the folder called
> hts-cache which includes my blog all my blog
> entries. But I can't access it without copying it to
> another folder.
No, it does NOT. It contains a list of files and the original, unmodified,
html only. There are no images in there.