Are you selecting a reference plane to extend to? If you don't want adjustment to rod length, I would uncheck the Rod Adjustments box, and only have the Place Embeds box checked along with the options.
Is Evolve throwing an error? Or does it just not do anything?
Also, you can set the file path to be anywhere, it doesn't have to be pathed to the evolve families folder. We have ours pathed to our own company library.