Trial and production installations of SAP Crystal Reports use the same software package.
Run setup.exe as an administrator from the installation folder. You will be prompted to enter your product key during the setup wizard.
It is important to clarify immediately:
: If the automated link only provides a key for the 2020/2025 versions, email customercare@sap.com to request a specific 30-day key for the 2016 version.
: For licensed users, keys can be generated through the SAP for Me portal by selecting the appropriate version (e.g., 2016) and system type (e.g., Test or Development). Trial vs. Full Version

