Hi Stacy,
I've changed the term without any problems; not sure why it didn't work for you.
The widget is set to come up in a Woo Sidebar (ie a plugin which you set so that it replaces another on a certain page/when a set criteria is met) on my shop page and all subsequent pages. For some reason it doesn't work on product pages, only shop and shop/category pages, but I can live with that.