I just recently started with the EIKON .NET api and I was able to get the example code (DataApiUsageExampleRealtimeData) working just fine. Since then I've tried to create my own project from scratch and have encountered some issues. Following the instructions to install the nuget package 'Eikon 4 Desktop Data APIs' the closest match I could find was the EikonDataAPI which was missing the ThomsonReuters.Desktop.SDK.DataAccess.dll and many other files. Following the Tutorials section I tried loading "Install-Package ThomsonReuters.Desktop.SDK.DataAccess.Signed" via the nuget command prompt and it was unable to find the package.
So I'm kind of treading water here wondering where I go to get copy of the API.