Does the level editor work on Windows 10?

[Romulator]

Try downloading the 1.2 Level Editor zip, then copying all the contents in there to the Amnesia folder, then "update" to 1.3 by copying those over to the same folder, replacing all files. Or rather, install the 1.2 editor first, then do the 1.3 editor.

The 1.2 editor has come files which the 1.3 does not, so those need to be included.