How do you change the URI of a SharePoint library? Based on Google searching, most people say that changing the name of a library in Designer (via right click->rename) will resu
At least at SharePoint 2010 it is possible to change library URL, without using SharePoint Designer.
Just go to a library trough 'All Site Content'. When inside the library choose on the ribbon 'Library' tab. Then select 'Open with Explorer'. That will open your SharePoint's library in Windows Explorer window. Navigate one folder up and you will see list of your libraries as folders. Rename required library's folder name as you want the URL to look like.