No I am not with avast support, we users are all volunteers here on the avast forum.
But I just described what interaction I experienced upon downloading from your link with the avast av solution active.....
This behavior of avast is while it is brand new to it and unknown, and under certain conditions avast will sandbox such executables first so the user can decide he has "the real McCoy.". The rest of the matter should be taken up with avast team members really, so file a FP report and they will act on the basis of that accordingly......
polonus