Backendless in windows

I just installed backendless in windows but I get the following error, to what is it?

manager-windows_Sj9fCafy4Y

Hello,

This is version 4 of Backendless, it is rather old and is no longer supported. The latest distribution of Backendless Pro is based on docker. You can find the installation instructions at:

The distribution has been tested and is ready to go for Linux/Mac OSX environments.

Regards,
Mark