How do I uninstall materials and brushes from the library?

  • Does anyone know how to uninstall brushes and materials from the library, not just deleting brushes from the brush palette. I made a couple test brushes and materials and now they are filling up the brush and material library, which takes a long time to scroll through. I have gone through and found the brushes inside several different folders under Documents> CELSYS_EN> ClipStudioCommon> Material, I started to delete the folders but I notice that when I go into the library they showed up as blank squares when deleted.

    Let me know, thanks!