When subscribing to the source code license you will get access to a zip file containing all the source code to build eco and modlr.

You need to massage the delivery a bit in order to build:

Create folders:

Start

Source

xternal

Extract Source.zip into Source folder (creates ECO and Modlr)

Extract xternal.zip into xternal

In the Source:

remove the postfix noscriptbuild  on files that have it

Remove Configuration.csexp files from project Eco.Interface and replace with Configuration.cs(.noscriptbuild)

Make sure you set build action = compile on files you include in project

All projects try to sign assembly with snk key ..\..\..\ecokey.snk. This key is not distributed - you will need to create your own local key. In the directory above Source save file ecokey.snk. You can create key in project properties signing. Either remove signing per project, or create your own key

If you remove the key – you cannot GAC the assembly and you will need to remove the build action that do the Gaccing - Source look for GacUtil in "$(ProjectDir)..\..\..\Xternal\DotNetSdk\v4.0\bin\Gacutil"- you can make sure it exists to avoid changing projects

Remove missing resource files from project

Build.

Find output in Start/Stage/Bin and Start/Stage/Modlr

3.