The patch is typically a small standalone utility.
Counter-intuitively, if you have less than 8GB of physical RAM, forcing Mugen to use more memory causes your PC to use the page file (hard drive as RAM), which is extremely slow. Fix: Upgrade your physical RAM to 16GB, or revert to the unpatched EXE. mugen 8gb patch
A file browser will appear; navigate to your M.U.G.E.N installation folder and select mugen.exe . The patch is typically a small standalone utility