Which version shall we used??

[gang wang]

I want update my ibatis.net from 1.5 to latest version, and use it in my new project.

so I checkout from https://code.google.com/p/mybatisnet/source/browse/#svn%2Ftrunk%2Fsrc, i think it's latest version of MyBatis.net  (3.x)

but in download page, the latest version is 1.6 & 1.9, and there have different namespace, 3.x is MyBatis, 1.x is IBatis

Which version shall we used?  ( we don't care increased workload of updating)