I am new to JasperETL. Just downloaded 3.1.1 and trying to find documentation but seems like i have hard time to find it.
Where should I look?
All documentation you can find in the Docs section:
It is not up to the current release, but it should be of much help anyway.
JasperETL is powered by Talend, and most of Talend resources apply to JasperETL, including pretty nice online tutorials. There is a seperate topic about this here