Materialize is a program for converting images to materials.
https://github.com/mitchelldmccollum/Materialize/releases
I decided to maintain Materialize for Linux, Windows, and soon Mac.
For sugestions, doubts or anything related to this tool. Make an issue and we can talk about it.
Double click on the Materalize.exe and it will open.
I'm developing using Unity 2019.1.9f1, it is recomended to use it if you are building it yourself. You can try to downgrade or upgrade with unity but it may break some of the code.
Added a new native file/folder picker - Unity Standalone File Browser - https://github.com/gkngkc/UnityStandaloneFileBrowser - Thanks to @gkngkc for the amazing work.