Can't import .spm files in blender 4.1

[moonvoidpro]

I have installed addons in \AppData\Roaming\Blender Foundation\Blender\4.1\scripts\addons and enabled them.

I have downloaded stk-media-repo from https://supertuxkart.net/Media_Repo and patched them with original STK installation folder, and I can open built models from the STK installation folder.

But if I opened the same file with Blender 2.79, the rendering will be different.

Blender 2.79 can't install the latest addones, and Blender 4.1 with addons cannot open .spm files even after patching the media repo to the original installation folders.

Should I install specific version of Blender, or use the conversion python script to convert the .spm files in installation folders?

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My working environment:
Blender 4.1
SuperTuxKart 1.4

Windows 11 Home 64-bit (10.0, Build 22631)
13th Gen Intel(R) Core(TM) i5-13500H
Driver Version: 31.0.101.5186

[thelabcat]

This looks like a color space problem. It may not be a problem with the addon at all. Check the image texture node in the material, and make sure the color space is set to sRGB. As for why it doesn't show on the model in the viewport, that could just be because the shading mode is set to solid.