Yes, post obviously in wrong section and this thread must be locked, i.e. no more new posts after this one.
If I remember correctly the "hb" means "with h
ook". Maybe those characters aren't much relevant anymore, because as far as I know actually there exists just one setup file which gives the user the option to download the handbook(s) or not. There was a time the user could choose between 2 setup files: one with handbook and another without handbook. The one with handbook had the characters in question in its name.
So, you know now.
NB: if you'd want to continue this discussion, please do it in this section
of the forum.