In notepad++, from the customui 88 SubdivTtools js file, I was able to cut out the base64 code, ( All of the code from just after ...base64, on down to just before " command="_Subdiv_beta9" ,
and paste it to the onle site:
https://codebeautify.org/base64-to-image-converter
and then download a jpg image.

I suppose an icon editor program could then make an icon,
but I do not know much about all of this.

What is a good, free, icon creator program?

- Brian

Why not use Moi itself ?...

At the end use the Print Screen Key and past in any 2D prog for have your image to manage ! :)

In the free Fotosketcher for example! (by a talentuous French guy) ;)
https://fotosketcher.com

(you can resize your image in 64 * 64 pixels if you want...and some other cool things!
here the process (all take 10 seconds! ;)

Past your save Screen from the ClipBoard
Crop / reframe
Permute image
Apply an effect if necessary
Resize image 64*64
Save you image 64*64
et voila :)

here just for validate the process




Here the image.jpg from fotosketcher
you can now apply your Base 64 beautity...

so the icon will be maybe something like that or smaller/bigger following the Options/ UI size of Moi...

Thanks Brian and Pilou. I will study all this carefully, it is very interesting to customize and standardize its interface in a pleasant way.

-Zooen