It's a marvelous open source RPA tool, with a premium paid version of service also available.
"Everybody's got to eat"
The documentation for installation is available and .msi makes the install process straight forward.
It is recommended to create an OpenFlow account as this provides a mechanism for controlling robots and workflow from a web UI.
The OpenRPA application is for creating desktop and web workflows from a UI. Using the recording option to capture steps which can be used as a basis for creating custom RPA robots is a good starting point.