Effect Editor 1.0.0.1981 is currently compatible with 4.9.2.29935 and beyond.
Effects written with with this version of the editor may not be compatible with earlier versions of Hippotizer.
Effect Editor is a tool which can be used to create or modify the effects used in Hippotizer to transform layers, mixes, and viewports. It is a C# editor with a built-in preview window, so the user can see what their effect is doing while coding.
Editor:
Manual:
https://www.manula.com/manuals/green-hippo/effect-editor/topic/general-information