Buying overseas you will be lucky if you even get it they will mostly likely want you to pay all or part of the money up front. Heard a lot or horror stories.
The other issue is that you are buying pirated software and most likely if some type of accident happened Toyota is not going to stand behind any warranty or lawsuit if they determine you were not using factory authorized diagnostics. Most OEM's have the ability to figure out if it was a factory authorized diagnostics or pirated diagnostics were used to make changes.