You can access the official installers for Windows, Mac, and Linux on the Silicon Labs Simplicity Studio page. :
To download Simplicity Studio v5 (SSv5), visit the Silicon Labs Simplicity Studio page and select the installer compatible with your operating system. simplicity studio v5 download
: Requires a support case for access; it includes the IDE and toolchain but typically excludes SDKs, which must be fetched from GitHub. You can access the official installers for Windows,