Data Export Widget File Name

With the Data Export Widget, it allows you to export data.

There is a slight problem which we are encountering, The file's name is always Data(x).csv.

We would like to have a custom name for the file instead of Data(x).csv.

We would want the file to be "now()+name".csv

Does anyone know how we could do that ?

I assume to change that I will need to change the code of the extension. But the extension's folder contains .jar and I don't know how to open these in order to modify the code inside.