If you still need the exact older version for a legacy system, contact NSDL support directly — they will guide you safely.
You can find the setup and related manuals on the official NSDL e-services portal: Official Downloads Page NSDL SPEED-e Downloads nsdlssusersetup200 download link
The NSDLSSUserSetup200 software offers several features that make it a valuable tool for investors: If you still need the exact older version
Sometimes the file is hosted under the e-services portal: nsdlssusersetup200 download link