1. It's not possible to "install" the Intelligent Indexing license via the DocuWare configuration web page
  2. It's not possible to change the mapping of the intelligent indexing fields via the option "change naming for document types", in the "Intelligent Indexing" PlugIn of the DocuWare Configurations. 

This behavior occurs if you are using the internet explorer 9, to solve this behavior use a newer version of the internet explorer or another browser (Firefox/Goggle Chrome).