It feels this area is completely useless
No matter what I write in there, Httrack just copies everyfile from the
website, what im doing wrong ?
Task:

1. Web addresses: (URL)
   example.com

2. Set options -> Scan rules
What do I write here so httrack only download .html files         from
example.com domain ? 

I have tried all the following
-*.png -*.gif -*.jpg -*.jpeg -*.css -*.js -*.pdf
(above rules doesn't have any effect, it still downloads all the pdf files)

I have tried like 40 different combinations at scan rules and none of them
wont work :( what im doing wrong? 

Product: HTTrack 
Version: '3.48-22' (3.48.22) 
Platform: Windows 
Language: English