Yes, unfortunately that version doesn't seem to have the export texture feature that was mentioned in that thread. (You can export the pre-indexed palettes but not the composited texture).
When I export the textures using this version of map2gl, I get something like this:
And when I export them using Ganesha, I get a grayscale version:
What I am hoping to extract is something that more or less resembles the colors in game, as seen in the aforementioned thread:
