thank you friend: jazzonya, to mention above.
below post a tutorial with images, so that it is easy to comprehension, first thanking: jazzonya: D
HOW IMPORT YOU CHARACTER MIXAMO TO LE
First, you must open your account Mixamo, and go to my assets session : http://prntscr.com/8bj133
after you need go to my animations tab : http://prntscr.com/8bj1sh
Now, you need to download each animation, one by one, so that the main Bone (mesh bone), already be downloaded with the animation that you would like to put on your character ... : http://prntscr.com/8bj40r
after what you request download : http://prntscr.com/8bj5gv
you need open LE project folder , and copy downloaded file inside any folder what you want , after what you do this .
http://prntscr.com/8bj6o0
ok , now open LE model editor , http://prntscr.com/8bj7el ,
after you've done all this, do this process with the "new" animation, we want to include in this model ...
http://prntscr.com/8bj89c
new model imported in LE : http://prntscr.com/8bj8ox
open Le model editor again , and go to FILE -> Load Animation : http://prntscr.com/8bj95m .
import new .mdl generated of new animation : http://prntscr.com/8bjadj
final result xD : http://prntscr.com/8bjb61