ext.ux.exporter config columns to export

Hello,
I use ext.ux.exporter.

http://edspencer.net/2009/11/ext-ux-...el-or-csv.html

How can I configure columns what I want to export ?

Thanks for your answers.

Sorry for my very bad english

It should just export the columns that you have on the grid. So if you don't want a column to be exported, remove it/hide it.