The specific request for the ".NET Framework 4.0" version places this discussion historically around the Visual Studio 2010 era. This was a pivotal time for Crystal Reports. With the release of Visual Studio 2010, Crystal Reports was no longer included in the default Visual Studio installation. Instead, it became a separate, standalone download.
SAP regularly releases (SP) for the Crystal Reports runtime. The last version fully compatible with .NET 4.0 is SP 25 (13.0.25). Later SPs drop .NET 4.0 support.
Elias began the ritual. He navigated through the labyrinthine archives of the SAP support portal, a place where time seemed to stall. He found the specific version—the 64-bit MSI installer—hidden like a relic in an ancient tomb. The download bar crawled. 10MB... 45MB... 80MB.
: SAP Crystal Reports for Visual Studio Downloads (requires registration for the latest Service Packs). Alternative Direct MSI Links : 32-bit Runtime (v13.0.x) 64-bit Runtime (v13.0.x)