Clip Studio doesn't let me add new text to my old post. I have to add new information to this new post. Hopefully it will help me or anyone who has the same problem as me in the future.
Now, I will tell the story in more detail.

- I have a 100% legal license for the Clip Studio Ex that I bought it myself. I have used the license 1 times on my home computer (As we all know, Clip Studio license can be used on 2 devices) Then I went to university and there I had to take an animation class, which of course required me to use a university computer for use in studying. And on the computer, the university has installed a free version of clipstudio. Then a friend of mine used his own license to activate Clip Studio on a university computer to get the data and brushes he used regularly for his work skills. But a few weeks later he discovered that his clipstudio license was still activated on his university computer because he had forgotten to log it out and he certainly didn't remember which computer he had activated it. Because we have 20 computers in our classroom, so I don't want to end up as miserable as my friend. So I need to make sure that my license is currently activated on which devices if there is a way to find out.