I did in fact write a much more comprehensive post, but it was lost in a moment of family crisis.
The help download was quite small, but when run, seemed to want to go back to the web and get more stuff. Fine, but then it was exactly the same as the original install of the main program, so I quit, a bit sharpish so as not to risk the main installation.
Having said all this, the help section seems to be working well, so I'll try to find some time to play with the W-Processor soon.
(L-O is reporting JRE running.)