When in doubt, choose the GCC version: yapib-0.1-beta-1-msc.exe: gen_yas.dll compiled by MSC and wrapped into a NSIS installer. yapib-0.1-beta-1-msc.dll.7z: gen_yas.dll compiled by MSC. yapib-0.1-beta-1-gcc.exe: gen_yas.dll compiled by GCC and wrapped into a NSIS installer. yapib-0.1-beta-1-gcc.dll.tar.bz2: gen_yas.dll compiled by GCC. yapib-0.1-beta-1-src.tar.gz: the source code.