Can you have multiple versions of Crystal Reports for Visual studio runtime on the same computer?
Crystal Reports developer for Visual Studio
Reproducing the Issue
Try to install more than one version of CR for VS runtime onto any PC
Runtime installation always removes old verison or indicates a newer version is installed.
Crystal Reports for Visual Studio uses the same folder structure and dll names when installing. This is not configurable and therefore you can only have one SP installed at any given time.
CR for VS, side by side,
KBA , BI-DEV-NET , BI Software Development Kits (SDKs) - .NET or Other , Problem