There are a couple of other ways to get to the device driver configuration. If you have the Kobo Utilities plugin installed, you can user Driver => Configure current driver. Alternately, you can open calibre's Preferences, then Plugins. Search for KoboTouch, select it and then click on Customize plugin. If you are using the Kobo Touch Extended driver, the first page is the same and if you use the same template, it makes it easier to switch between the two.
My preferred template is:
Code:
Elibrary/{author_sort:sublist(0,1,&)}/{title} - {authors:sublist(0,1,&)}
Basically, Elibrary / (first entry in the author sort) / title - (first entry in the author list). That trimming helps to keep the total path length under control.