The ELM transmitter version 4.0 works only if the .NET Framework 4.5 is installed on the device. In the Windows versions 8.0 + 8.1 this Framework is already installed by default. In the versions "Windows Vista" and "Windows 7" it must be installed.

The download link can be found here:

For versions of Windows XP and older the .NET Framework 4.5 is not compatible.

If the following error when testing the interoperability or the Ping screen appears, this indicates the lack of .NET Framwork: