Replaced 2.0.4 Windows package

The 2.0.4 Win32 installer (ep128emu-2.0.4.exe) included a broken libsndfile-1.dll file, which prevented all audio file related operations in the emulator from working. There is an updated package available now, which should hopefully fix the problem. Other than the replacement of libsndfile-1.dll, it is identical to the original release.