It's impossible to say what is the license type of this application, since it doesn't exist anymore. This is a very old application that hasn't been updated for a long time. The company that developed Extra! Personal Client released other products. I have searched their website, but only the new products are listed on the Products page.
You can check them to see if something fits your needs: https://www.attachmate.com/products/
Additionally, get in contact with the developer to obtain additional info about the Personal Client's availability: http://support.attachmate.com/contact/