I noticed this behaviour that IMHO is wrong: the blocker, once set to block writing of executable files, rises the pop up when ever you try to open a folder whose name is "xyz.com" (for example).
Now, nobody actually names a directory that way on purpose but there are software that creates directories upon installation with the name of a website, for example TopStyle the CSS/HTML editor creates this entry:
"C:\Documents and Settings\Administrator\Dati applicazioni\Bradsoft.com"
As result, whenever I try to list the "\Dati applicazioni" content I got the pop-up from the blocker.
If possible, AVAST should be able to recognize directories from files.