[LVL ED] Level Editor coldly crashes?

[Verkehr]

Well, here's some fun information:

During the recording of the video, I had to record it twice. The first didn't record fully, somehow. Inside of the first recording, Amnesia as the game didn't want to launch.

Since I posted the reply above, I went to make Steam check if everything is there. Of course, 3 files were missing.

After downloading them, both the editor and game work without flaws.

Well, sorry for the trouble. I don't know honestly what could go missing. I DID delete some files before (after incorrectly installing a custom story), but then, I instantly verified the game files and they all got downloaded. Can you maybe find out what did go missing? Thanks in advance.