The same Hijack works equally well for the 2.0 final software or for the 3.0 alpha software. As long as it's a fairly recent version.

Remember that the 3.0 alpha software has problems with its database rebuilds, has bugs, and is not recommended for daily use yet. It's called "Alpha" for a reason. Most folks should stick with 2.0 until 3.0 is more stable.