fork http://xray.codeplex.com/
X-Ray unofficial toolset for complex use with official S.T.A.L.K.E.R. MOD SDK. The code to load/save X-Ray files closely follows the GSC one. Regarding the rest source code, you can do whatever you want, just do not say you wrote it.
And see Release section.
Visual C++ Redistributable for Visual Studio 2015 is required to run programs.