how do i import spriter file into c2 or c3

I've followed instructions of BrashMonkey's videos.

youtube.com/watch

youtube.com/watch

but i cannot import sprite sheeted animations into the project.

there are three files (animation.json, animation.png, animation.scml)

in c2, I dragged and dropped a single .scml file into the project, than opened a .png file into .scml object, but nothing happened.

in c3, I even cannot drag and drop a .zip file(contains png, scml and json) at all...

its so frustrating.

help me.