> “Game Engine Product” shall mean software used for video game development. This includes both the content authoring software and the software used to show the created content.
The license allows redistribution so long as:
> a) You do not sell or otherwise commercialise the Work or Derivative Works as a Game Engine Product; and
So my read is that any tool that allows you to modify game content constitutes a game engine product and they specifically do not allow you to sell a game engine product built with Defold.
This weird technicality that is invented in this discussion about whether or not you're using Defold's built-in engine tools, or developing your own tools on top of Defold is entirely irrelevant to the language of the license.