Fair warning: While that program itself is open source, it's hard to patch/contribute to these type of projects if you aren't developing on Windows. Like a lot of Win32 applications it has MFC as a build requirement, which is still proprietary and not straightforward to use outside windows: https://wiki.winehq.org/Winelib_User%27s_Guide#Dealing_with_...

(I speak from frustration after trying to build MFC apps on Linux to varying degrees of success)