I think it is dependent on the game being installed on your machine to get the graphics and dependency information. I am not sure but I don't think you can download just the editor.
all the data files that the editor uses are so tightly integrated into the game data files that if you were to theoretically download the editor you would practically get the entire TFT expansion pack anyway. So no, there is no real such thing as a "standalone TFT editor".
And technically the TFT editor is not free anyway, Blizzard says it is an extra, but in reality part of the money you pay goes towards the editing tools.
I'm on a page about incorrect corrections, and spent the better part of like two hours trying to get someone to understand that -5^2 = -25, not 25, and then that post had comments get reposted because that group is self sustaining, and that person was in turn trying to explain what I just explained to them. And I'm taking that as a victory
I will be AFK for a couple of days you guys hold down the fort while I am gone. I will be checking in on my phone but that will severly limit me. Be back saturday!