If this DLL came with a game, emulator, or development kit, reinstall that software from the official source. The correct DLL will be placed in the right folder.
If an executable complains this DLL is missing, use Dependency Walker or Process Monitor to see which folder it expects the file to be in. Then locate the original software installer. If this DLL came with a game, emulator,
Do not just throw the DLL into SysWOW64. For audio plugins, context matters. same concept). Not exactly libscumeuphoria
Option A: System-Wide (Only if required) or development kit
Option B: Application-Specific (SAFER)
One reliable free alternative that achieves similar results is the Analog Obsession Euphoria (different name, same concept). Not exactly libscumeuphoria, but provides a high-quality 32-bit DLL for saturation. You can download it from Patreon (free) or GitHub. This will work as a VST3 or VST2 DLL in Win32 hosts and does not require obscure hksimd dependencies.