If you hold a current SolidWorks subscription, you can downgrade to any version from the last 10 years via the SolidWorks Customer Portal.
Instead of using a high-risk activator for outdated software, consider the following legal alternatives:
SolidWorks Maker License:
Free CAD Alternatives:
To be explicit:
Dassault offers migration tools to convert legacy files. Contact a reseller for upgrade pricing—often cheaper than maintaining an insecure legacy environment.