Jint has been rewritten completely and is now hosted on Github at http://github.com/sebastienros/jint
The main differences with the previous Jint you could find here are:
- Portable Class Library so you can use the library on any .NET platform
- Based on the ECMA 262 test suite, comprised of more than 11500 unit tests to ensure every piece of the ECMA specification is respected
And you still have the best performance you can get for real world scripts, string .NET interoperability, and a command line interface to run scripts from the command line.
It's also available on nuget: https://www.nuget.org/packages/Jint
You are strongly advised to convert your project to this new release, and open new bugs and feature requests on Github.