Ok these are possibilities:
-In "Download file" there should be destination like "c:\updated.zip" not only "updated.zip" becouse it will download somewhere where program can't do anything with it, so use "Path" object
-Don't do the "Always" event it makes a lot of bugs in you'r program, attach the unziping to "Downloaded file" event.
-And about 'Unzip to "" ' ... use path object becouse program cant tell where to unzip