remove graphics for green and red circuit's and use factorio default high def one you can find them in \Factorio\data\base\graphics\technology

all you need to do is delete the graphics for these 2 in the mod and edit 4 line's to make it work correct
line 29: icon = "base/graphics/technology/electronics.png",
line 30 and 50: icon_size = 256,
and line 49: icon = "base/graphics/technology/advanced-circuit.png",

here is link to how it looks now for me after editing those line's to base graphics for the technology tree
https://imgur.com/a/8ft2ItY

now for the plate's i got nothing so thats gone stay low res

nvm also made a quick high res graphics for the plates icon also
just replace plate_productivity.png with the new i put on imgur and set the "icon_size = 256,"

[FIXED]

I cannot find any github repository where this could be contributed via a PR? Have you found one?

idk i dont really care i send ErrorTheCommie an updated zip i dont care if i get credit or not

edited like 8 lines
upscaled iron plate and copper plate graphics PNG's using an ai upscale site to 400% then i just combined them using paintdotnet (GOOD OLD PAINT DOT NET)

removed 2 PNG's from it and replaced 1

and then it was just updating the info.json file and renaming the zip and folder in the zip to match the new version

overall this is a very simple mod

also I'm an idiot i cant code at all i can read code and some what make heads or tails from it and edit it but overall I'm an idiot