If you only have the 32-bit version of Nexus 2 and cannot access the 64-bit installer, you can "bridge" it. Modern DAWs like FL Studio have a built-in bridge, but for others, is the industry standard.
“I can just copy Nexus2.dll from another PC.” Truth: Nexus 2 uses license files and registry entries. Copying only the DLL will not work. refx nexus 2 dll 64 bit link
Finding a working can be a real headache, especially since the original Nexus 2 was primarily a 32-bit (x86) plugin. If you are looking to integrate this legendary rompler into a modern 64-bit DAW like FL Studio 21, Ableton Live 11/12, or Cubase, The Evolution of the Nexus 2 DLL If you only have the 32-bit version of