I removed your link because it leads to code that is suspicious consider its source (somewhere on a file sharing site). The software you linked to is probably a legit copy of Mesa llvmpipe on GitHub (use the mingw build of opengl32.dll). Doing this overrides any selection of Settings > Display Method and makes it use software, which is reliable but not good peformance for video display.
This issue and above-mentioned Mesa software override is related to this bug report on GitHub: