Hi i was exploring the settings and i found this error,the option is for websites not for files extentions,see picture
Yes, but the comment is still valid.
But you are going to repair it,right?thanks for your respond
Repair what? I don’t see anything wrong there.
i mean instead of "enter extention to exclude i.e *.txt
enter trusted website to exclude i.e google.com
You are talking about something else 
I am not saying it’s not true (what you say), but so is what the text says now - if you want to exclude specific file extension, no matter what URL is before, you enter *.txt. This way, you’ll exclude google.com/file.txt, microsoft.com/blah/document.txt, etc.
So I don’t think there’s anything to fix.
While at the Web Shield’s Exclusion dialog, press the F1 key to see the Help content.
May be a mute point at this time as it appears it not working: ???
http://forum.avast.com/index.php?topic=57029.0
just what I was gonna post
OK on a side note, as has been posted earlier today in another thread, the setting beneath (URL exclusion), doesn’t work at all
http://forum.avast.com/index.php?topic=57029.msg480890#msg480890