Is there any tutorial for the DotTool?

[Chromowolf]

[Buizz]

This is a simple basic usage in Korean.
https://cafe.naver.com/edac/94767

[Chromowolf]

Thx a lot! But this article disallows all non-cafe users to view.

You know, as a non-Korean, it's nearly impossible to pass the verification procedure:

Armoha told me a tutorial but it was too hard to follow:
https://blog.naver.com/fullhyuk/221462331342
I finally gave up. :(

[Chromowolf]

Ah, I somehow managed to view the tutorial. (Armoha gave me some screen shots)
But I was stuck at the picture importing step

How can I import a image of right size?
I tried to import the following 32x32 pixel PNG file, but there is no response in EE3:

Still blank:

[Buizz]

Doesn't this window appear?
Or is it popped up but there is no response when you select an image?

[Chromowolf]

It pops up but no response after selecting an image.

No response: