I suppose you could use it as "download" in the sense that you "receive" something, such as a file; but it's stretching it in a very formal way. Most Greeks would not use this word to signify "download" - there is an exact word for this "καÏÎβαÏμα" (noun of the verb "καÏεβάζÏ" - to pull down.)
ÎήÏη also means "to take" or to "act upon" something, such as a decision or a measure.