No matter how many times I press F11, the World Editor won't close, why is that? --- Post updated --- I removed all mods, checked integrity, and could not resolve the above issue unless the game was running in safe mode.
if you have a way to reproduce this without mods, then please create a support id with this https://supportid.beamng.com/
Also check logs, if Lua scripts are failing for some reason, it might not get to the F11. Make sure that your have the shortcut bound to F11 for editor toggle active.
Here's the situation, the material preview images are all black, I tried to close the world editor in the File column but failed and had to force quit the game with alt+F4. Oh! What a pain! --- Post updated --- Ah, I didn't catch that.