It’s important to clarify that (often associated with SpringSoft , now part of Synopsys) is a commercial EDA (Electronic Design Automation) tool used for IC layout editing and verification. It is not legally available as freeware for the 64-bit version (or any version) beyond a possible limited trial or student edition.
If you are using this for school, contact your automation professor. Schemaplic often provides free educational licenses to institutions. Do not risk your PC with a virus for a tool you can get legally through your school.