Hi,
thank you very much for posting your error message. At the moment, I am not able to build fuzzylite in 64bit as I do not have a computer able to run something greater than Windows XP.
A quick (and dirty) workaround would be to disable the warnings being treated as errors by modifying the build script and removing the /Wx /W4 from the CMakeLists.txt in line (somewhere around) #80:
if(WIN32)
set(CMAKE_CXX_FLAGS “/WX /W4 /EHsc”)
Could you please try and let me know?