having this issue on win7 in Clion 2016.3
with both 0.2.2 from jetbrains repo
and 0.2.3 from https://github.com/mallowigi/material-theme-jetbrains/commit/9cf39e7de0e899a2466b3b10b07f1abca8eeec69
psd icon seems to use image.png instead of psd.png

python icon seems to work in tabs but not in source tree

C files seem to work correctly in my build. As for the PSD, it might come from the inclusion in the "Images" category. I'll release the fix in a future build, for now there is not enough changes for me to do so.
I've made a fork of the project called... "Material Theme UI Fork" in the plugins section. Try to install it after disabling this one, until the maintainer comes back.
@mallowigi thanks, that's great! i ll check it out
@mallowigi If you'd like, I can add you as a collaborator to this repo, so you can push to it directly? I don't have enough time these days to maintain it, so any help would be great.
Well that would be best indeed.
regards the bug, i tested this in clean VM with clean install of CLion 2016.3.2
some icons still don't work

.pdf .h .py
the plugin is latest from jetbrains repo you suggested @mallowigi
Ok I'm trying in CLion. Why are the files in gray though?
@mallowigi they are greyed out when aren't declared in CMakeLists.txt
were you able to reproduce?
Yeah and I found the fix. It could even fix issues related to the Java files and stuff. But I think the C/C++ icons are too blue and too much blended into the blue background. If someone has a better alternative I'll be glad to change.
@mallowigi
check out the up-to-date icons in svg here: https://github.com/jesseweed/seti-ui/tree/master/icons
some of them also seem updated vs used currently in jetbrains theme, ie cpp icon is no longer thin and is more consistent with c icon.
color seems fine to me:

We should be using the icons found here: https://github.com/equinusocio/material-theme/tree/develop/icons
Keep in mind, this is the Material Theme, not Seti 馃憤 If you'd like to create a Seti-version, feel free to fork and adjust :-)
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@mallowigi If you'd like, I can add you as a collaborator to this repo, so you can push to it directly? I don't have enough time these days to maintain it, so any help would be great.