The program was build using Visual Studio 2013. After opening the solution, make sure you have CefSharp.WinForms and Microsoft.VC120.CRT.JetBrains included - if not, download them using NuGet.

PM> Install-Package CefSharp.WinForms -Version 57.0.0-pre01
PM> Install-Package Microsoft.VC120.CRT.JetBrains

After building, run either _postbuild.bat if you want to package the files yourself, or bld/RUN BUILD.bat to generate installer files using Inno Setup (make sure the Inno Setup binaries are on your PATH).

Built files are then available in bin/x86, installer files are generated in bld/Output. If you decide to release a custom version publicly, please make it clear that it is not the original TweetDuck.