RaiDrive.ShellExtension.x64.dll installation fail is so rare.
We need testing time at this moment and coke & pizza (, here is deep night).
If we need more information or a real environment, then we will let you know.
The Windows 10 Universal CRT is a Windows operating system component that enables CRT functionality on the Windows operating system. This update allows Windows desktop applications that depend on the Windows 10 Universal CRT release to run on earlier Windows operating systems.
Microsoft Visual Studio 2015 creates a dependency on the Universal CRT when applications are built by using the Windows 10 Software Development Kit (SDK). You can install this update on earlier Windows operating systems to enable these applications to run correctly.
This update applies to the following operating systems: