Shoutbox

Ok another basic picture, and I KNOW that lots of file types are missing but I didn't wanna waste major time on a basic preview picture to what may or may not happen and making it look perfectly like what it could be. Here it is I hope it puts more supporters into the idea so it may eventually be made.

The blue lettering on Advanced would probably be a clickable area, I don't know yet maybe they can have that and use the check box to chose weather to activate the advanced options or not.

[EDIT]:
There could also be a third button to extend the list next to OK and Cancel where you can type in your own file types to add to the list.
This would open a new box with a typing box saying enter file type here:, a text box to put it in and OK next to it, with Cancel under it. this would add a new file type to the list for you to allow/block