The changes in this version include streamlining the the extension by removing the drop down from the button. All the settings can be still found in the option's window. To to Tools menu then Add-ons; in the Extensions tab you will find the extension and be able to open it's options. Another change is that once the button, which is located inside the url bar, is clicked the url is automatically copied to the clipboard, though this can be turned off.
The extension also added support for Xrl.in link Groups, if you right click on the tab bar you can create a link group of all the currently open tabs.