Did it several time, tried running the terminal from different folders, it always, however says:
usage: chmod [-fhv] [-R [-H | -L | -P]] [-a | +a | =a [i][# [ n]]] mode|entry file ...
chmod [-fhv] [-R [-H | -L | -P]] [-E | -C | -N | -i | -I] file ...
And the file icon doesn't change, it remains blank. Btw it previously asked for my password, now it doesn't. Maybe i should do something with the .zip itself? Dunno.