Caristix provides an Excel Template to list your systems and dataflows and import them into a diagram.
The template is included in the application installation and located in %AllUsersProfile%\Application Data\Caristix\Common\Samples\Excel\InterfaceEngineTemplate.xlsx.
Create a copy of the template file and edit it to represent your environment. Then in the Diagram Editor, click on TOOLS -> Import Dataflows…
In the Import Dataflows window, select From Excel file and click OK, then browse to the Excel file you just created.