The Dolby Atmos Conversion Tool v1.8 on Windows 7 requires Microsoft Visual C++ 2015 Redistributable (x86) – 14.0.23026 installed.    Windows 7 is used on Dolby Atmos Theatrical RMU's.    This will not be an issue if running the Dolby Atmos Conversion Tool on any Windows RMU with the v 3.x Renderer installed.

Microsoft Visual C++ 2015 Redistributable (x86) – 14.0.23026  can be obtained here: 

Note that this build is just labelled as Visual C++ Redistributable for Visual Studio 2015 release date 7/20/15

A Microsoft dev account is required.