I've created an add-in that change radius of sheet metal parts and I'd like to share it with the community. All the code is free and available at github so you can fork it.
For those of you who are testing it, please run the installation with admin privileges because it runs a instance of regasm (64, v4.0) and let me know if it installs well.
Requirements are 64 bits and .Net Framework 4.5+ (I would highly recommend SolidWorks 2015 SP.0 or superior)
So what does this do again?
This will drill down a specific directory changing all sheet metal features radius for sldpart files.