Here are the steps to uninstall the Free Edition of Extradium 2013:

  1. In the Extradium Forms-based Authentication page (in the Extradium Central Administration site), disable Extradium from all the web application zones where you enabled it. You can verify that Extradium has been successfully disabled if you visit the Solutions Management page and check that the riolinx.extradium.webparts.wsp solution isn't deployed to any web application.
  2. From the folder where you originally installed Extradium 2013 from, please run the RetractExtradium.bat file